What is Reddit's opinion of AQUANEAT Aquarium Circulation Pump, Fish Tank Powerhead Pump, Saltwater Wave Maker, Submersible Water Pump, Suction Cup, 2pcs (Small 480 GPH)?

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I've used these on my 90 and they are fine. Can't control them or anything crazy but they do the job

https://www.amazon.com/dp/B07YTGPLK3/ref=cm_sw_r_cp_apa_i_sxKzFbD6KTRHJ

Nice...Keep going, but be careful with multiple radiators in series. As you may have mentioned before, one radiator may be a heat exchange bottleneck. I have made the same mistake in the past. One thing to try is making sure the lesser of the two radiators is first in line to triage the fluid before being forwarded to the second higher performance radiator. A dedicated smaller pump between the two is recommended to insure flow is maintained. Another option is cooling in passive stages, which is the most effective in my tests.

Once the fluid exits the first radiator, direct it into a Petco 5.5 gallon fish tank (approx $15) with two submersed circulation pumps (like this) tuned down to a slow speed to keep the fluid moving (dissipating heated molecules). It is also a decent spot to add any filtration or multi-stage fluid "waterfall" drops that also help with cooling.

Re: Fan Power: 12v x 8A = 96 watts +20% buffer = 115.2 watts (round it up to 120w - 10A) total 12v power supply capacity needed - so you should be good. Depending on your miner power supply, you can tap into that too instead of using a dedicated PSU. For example, the extra (10th) power pigtail on the APW-3++ PSU should be able to support the fan + the L3+ on 110v at the wall (up to 1200 watts). Not possible with (2) miners connected to a single APW-3++ PSU unless you plug it into 220v to realize the full 1600 watts supply.

If your existing PSU is not powering the fan properly, double check the wiring. In some cases reversing the wiring helps, but make sure the direction of air flow is correct. Another possibility is the PSU is simply bad. If you have a voltmeter, check the voltage with and without the fan connected to make sure it stays at 12v (+/-5%). Other PSU options are here.

Scott-