Antminer S21+ Hydro 338T
The entry into hydro: S21+ efficiency at the lowest price in our liquid loop.
Bitmain HK3 hydro containers in Paraguay, running for four years. Electricity from $0.072/kWh, sourced from hydroelectric dams — and a calculator that shows your real numbers, not marketing ones.
97% uptime guarantee · Legal import, customs-cleared · 24/7 on-site security
Paraguay generates almost all of its electricity from hydroelectric dams. No coal, no gas, no diesel generators. Some of the cheapest clean power on the continent — and the reason we are here and not in Texas.
Inside the HK3 container, distilled coolant runs directly across the hash boards. No fans screaming at 75 decibels, no dust, no hot aisle. We manage the distilled water, the pumps and the whole loop — that is our job, not yours.
Liquid pulls heat off the chip far faster than air can. Lower junction temperatures mean fewer failed boards, less throttling, and a machine still hashing at full rate in year three.
Your pool, in your name, handed over to you to manage. We never touch your payouts. You watch the machines through Foreman, we keep them alive.
Most mining calculators use a generic power cost. This one uses the tier you would actually pay with us, and it drops automatically as you add machines. Live network data, your machine, your quoted price.
| Period | BTC | Revenue | Power | Net |
|---|---|---|---|---|
| 24 hours | 0.002777 | $222.10 | -$97.55 | $124.55 |
| 7 days | 0.019439 | $1,554.67 | -$682.83 | $871.84 |
| 30 days | 0.083309 | $6,662.87 | -$2,926.43 | $3,736.45 |
Over a year that is $20,613 more in your pocket, and hardware paid back 34.6 months sooner — from the power price alone.
Nothing changes here except the Bitcoin price. Same machines, same hardware cost, same power tier. A doubling takes your payback to 15.0 months — which is why the number you see today tells you less than you think.
Send us these numbers as they stand and we answer with a written offer: gross and net, power cost, deposit, payback — at today's verified prices.
Estimates only. Network difficulty and coin prices change constantly, and so does the price of hardware in China — we verify the real machine price before every purchase. Pool fees and your own tax position are not included. Network difficulty and rewards updated 2026-09-06 (refreshed monthly). Machine prices current as of 2026-09-06, updated whenever they change. Coin prices live.
There are grids on this planet selling electricity for half our price. What they rarely publish is how many hours a year your machine is actually allowed to run. Here is the same S23 Hydro in both places, at today's Bitcoin price.
| Per machine, per day | Acuario · Paraguay | Cheap grid elsewhere |
|---|---|---|
| Electricity price | $0.072 / kWh | $0.040 / kWh |
| Uptime you actually get | 97% | 60% |
| Mining revenue | $21.54 | $13.33 |
| Electricity cost | -$8.96 | -$3.08 |
| Net, per machine, per day | $12.58 | $10.25 |
That grid is 44% cheaper per kilowatt-hour and still finishes 23% behind, because a machine that is switched off earns nothing while your capital sits idle. Compare uptime, not tariffs. Figures use today's Bitcoin price and one S23 Hydro at block reward 3.125 BTC.
Read this before you judge the number above. It is the part of the business almost nobody in mining hosting will say out loud, and it is the reason we put the calculator first instead of hiding it.
Bitcoin has moved in roughly four-year cycles for its entire existence, anchored to the halving that cuts the block reward in half. That has a direct and uncomfortable consequence for anyone buying mining hardware.
When the price is high, the calculator prints a beautiful payback, hardware is expensive, everybody wants machines and the queue is long. When the price is low, the same calculator prints four years or worse, hardware is cheap, and the phone stops ringing.
History has generally been unkind to the first group and generous to the second. Your payback is not a property of the machine. It is a function of a price that has repeatedly doubled and halved. A payback that looks bad today gets rewritten by a single upcycle. A payback that looks perfect today usually means you paid a premium at the top — for hardware and for the queue.
One price, per kilowatt-hour, in US dollars. It drops as your fleet grows — no negotiation needed to reach the published tier. Pay six months up front and we apply a further rebate.
Hosting contract runs for a minimum of one year · Minimum order: one machine · One month of electricity paid in advance · Six-monthly prepayment earns a rebate · Deposit of $350 per air-cooled machine and $500 per hydro machine — at the end of the contract it is used up as electricity, so you do not lose that money
This is not a frontier bet. Paraguay is now the fourth-largest Bitcoin mining country on earth, and it got there on surplus hydroelectric power that would otherwise be sold across the border for less.
On the legal side, straight facts. Mining is legal in Paraguay and taxed like any other business — there is no special crypto-mining tax. A dedicated mining bill has been in front of the legislature since 2024 and has not passed, so ordinary commercial and environmental law is what applies. We import through the normal legal channel: customs-cleared, with despacho, and a factura legal issued in Paraguay. Anyone telling you the country has a bespoke crypto framework is selling you something.
You buy the hardware through us, we order it in China, and from that moment it is our problem until it is hashing in your pool.
Freight from China, customs clearance and all import handling. Roughly two weeks in transit, one week at customs.
Machines are legally imported and cleared. You receive the despacho and a factura legal issued in Paraguay.
Delivery to the facility, physical installation and connection into the hydro loop.
Firmware, tuning and network configuration — brought online and verified before handover.
We configure the pool in your name and hand it over to you. Payouts go directly to you; we never hold your coins.
Machine warranty from Bitmain, plus transport to and from service for the first year at our cost.
Routine cleaning, inspection and day-to-day management of your units.
Distilled water, pumps, heat exchange and the entire cooling plant. The part nobody tells you about until it breaks.
24/7 on-site guards, camera coverage, and hardware monitoring through Foreman.
This is not a shop and there is no checkout — you cannot pay here and we would not want you to. Build a list, send it, and we come back with the real cost from China plus your electricity tier. Hydro is Bitmain only; for air-cooled, tell us the model and we source it.
The entry into hydro: S21+ efficiency at the lowest price in our liquid loop.
The bigger S21+ bin: more hashrate in the same 15 J/TH class.
S21e XP generation at 13 J/TH — the middle of the hydro range on price and efficiency.
5-nm S21j XP chips at 12 J/TH: the most hashrate on the list under $10,000.
The first Bitcoin miner to break below 10 J/TH. Our default recommendation for anyone starting now.
The most efficient machine we host: 8.9 J/TH at 600 TH/s. The flagship.
Hydro machines run inside the HK3 container on a closed distilled-water loop. Bitmain only here — the loop is built to their fittings and pressures. Prices current as of 2026-09-06. We update them whenever they change and confirm the exact price before every purchase — everything is included except the deposit; prices in China can move with Bitcoin, the season and the wider market.
The list above is what we host most often, not a limit. If the model you want is not there — another manufacturer, another algorithm, a machine that only just launched — tell us what it is. Our suppliers in China can source most units, and you get a price back rather than a shrug.
You are about to send hardware worth six figures to a container on another continent. You should know exactly whose hands it lands in — and be able to get one of them on WhatsApp when something matters.

Acuario Hosting is run by Filip Csaszar and Jaroslav Dzurilla. We founded it, and we still manage it day to day — there is no layer of account managers between you and the people responsible for your machines.
We have been building businesses in Paraguay for four years, and mining hosting is not the only one. That matters more than it sounds: we did not arrive with the last bull market and we are not planning to leave with the next drawdown. The container, the cooling plant and the security are ours to keep running.
We are Bitcoiners first. We mine Bitcoin, we hold Bitcoin, and we will tell you when we think the timing is wrong for you — including when that means not selling you anything this quarter.
One minute from the operation in Paraguay — the container, the machines, the people.
Our Bitmain HK3 hydro container in Paraguay: the transformer we installed, the medium-voltage line we connected to, the racks inside. Photographed by us, on the day.






Including the uncomfortable ones. If something here is a dealbreaker, better you know now than after signing.
One deposit per machine: $350 for air-cooled, $500 for hydro. At the end of the contract it is not refunded in cash — it is used up as electricity, covering your final power bills until it is gone. Either way, the money is spent on your own machines. Nobody loses it.
USDT and USDC. Electricity is billed with a minimum of one month paid in advance. Pay six months ahead and we apply a rebate on the electricity rate, or agree other terms with us.
Straight answer: the hosting contract stands and electricity remains payable. We will not pretend otherwise. That is why the calculator above shows you the breakeven price before you sign, and why our power tier matters more than any other number on this page.
No. Insurance is outside our services and each client arranges their own. We provide 24/7 on-site security, camera coverage and Foreman monitoring, but the machine remains your asset and your risk.
If you do not renew, the machine is yours to collect or ship wherever you want, at your cost. We hand it over — the logistics from that point are handled by you. Your remaining deposit is consumed as electricity on the final bills.
Hydro hosting is Bitmain only — S21 and S23 series. For air-cooled hosting we work with a range of models and brands, including Scrypt machines like the L9 and L11 that mine Litecoin and Dogecoin. If we do not list the model you want, tell us: our suppliers in China can source most units.
Every price on this site is our real all-in price — machine, shipping, customs, installation, everything except the deposit — and it shows the date it applies from. We update prices whenever they change and confirm the exact figure before every purchase, because prices in China can move with Bitcoin, the season and the wider market. Volume discounts apply from 5–10, 10–20 and 50–100 units.
Yes — the minimum order is a single machine. We host for individuals with one miner and for operations running large fleets, and we can expand capacity for serious volume. The electricity tier is the same published scale for everyone.
Yes. Mining is legal and taxed as an ordinary business — there is no special crypto-mining tax and no dedicated crypto law. A bill to regulate mining has been before the legislature since May 2024 and has not passed, so ordinary commercial and environmental rules apply. Our machines enter the country legally: customs cleared, with the import documents (despacho) and a factura legal issued in Paraguay.
Count on three to four weeks. Once we have verified today's price in China and you have paid, shipping to Paraguay takes about two weeks and customs about one. Then we rack the machines, configure them, set up the pool in your name and hand it over. The written offer states the dates.
You do. We configure the pool in your name, point it at your payout address and hand over the login. Mined coins go straight from the pool to you — we never hold your coins and never touch your payouts. Our role is the machines, the power and the site.
Every machine is monitored through Foreman, so hashrate, temperature and status are visible in real time, and your pool shows what you are earning. On site there is 24/7 security and camera coverage. We guarantee 97% uptime and answer on WhatsApp when something needs attention.
Hydro machines run in our Bitmain HK3 container on a liquid loop: they are the most efficient units we host (the S23 Hydro is under 10 J/TH), run cooler and quieter, and carry a $500 deposit. Air-cooled machines are the simpler entry — S21, S21 XP, S23 — with a $350 deposit. Put both in the calculator at your tier; the payback tells you which one your budget wants.
You contract with Acuario Hosting LLC, a US company registered in Wyoming, which runs the hosting in Paraguay under its own hosting agreement and on its own infrastructure. Nothing requires you to travel: offer, contract, payment in USDT or USDC, pool handover and monitoring all work remotely, in your language.
Bitcoin first — that is what we run and what we know best. The Antminer L9 and L11 mine Litecoin and Dogecoin at the same time. Other Bitmain machines — Zcash, Kaspa, Ethereum Classic — we can source through our suppliers in China when it makes sense; the calculator already covers all five algorithms, so you can check the numbers before asking.
We are miners, not advisers, so here is what the record says rather than an opinion. Bitcoin moves in roughly four-year cycles tied to the halving; the next one is expected in 2028. Historically, anyone who held Bitcoin for three years was in profit at about 99% of entry points, and at five years at every one. Hardware is cheapest exactly when payback looks worst — which is why the calculator shows you what happens if the price halves or doubles, not just today's number.
Send us the model and quantity you are considering. We verify today's price in China, calculate your electricity tier and come back with a written offer — no obligation, no pressure.
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