850 Gallon Build - Pump Advice

1000G Nano · Nov 11, 2024

I’m upgrading my 265 to an 850. I wasn’t originally planning on going this big but a friend of mine in the industry had a customer walk from a tank after giving a substantial deposit. The tank dimensions are 10x4x34”. It is built out of 1.25 in acrylic. On my existing system, I have L2 vectras and only have them running around 75%. I am looking for some advice on return pumps, thinking 2 abyzz a400s or some commercial grade pool pumps. I also realized I either need to get stronger magnets or find out if there are any power heads out there that are meant for 1.25 in and thicker aquarium walls. Any and all comments/recommendations are appreciated. Here’s a few pics of the existing system that’s stocked to the gills.

ShakeyGizzard · Nov 11, 2024

Awesome tank, but your question is way out of my experience zone. Never delt with that much water flow. Don't know what the larger powerheads have as max tank thickness on them.

Gumbies R Us · Nov 11, 2024

Robert S Colton said:
I’m upgrading my 265 to an 850. I wasn’t originally planning on going this big but a friend of mine in the industry had a customer walk from a tank after giving a substantial deposit. The tank dimensions are 10x4x34”. It is built out of 1.25 in acrylic. On my existing system, I have L2 vectras and only have them running around 75%. I am looking for some advice on return pumps, thinking 2 abyzz a400s or some commercial grade pool pumps. I also realized I either need to get stronger magnets or find out if there are any power heads out there that are meant for 1.25 in and thicker aquarium walls. Any and all comments/recommendations are appreciated. Here’s a few pics of the existing system that’s stocked to the gills.

Not the answer to your question, but you have an amazing looking tank!

twentyleagues · Nov 11, 2024

Can you drill the tank for closed loop? That would eliminate or at least greatly cut down on needed power heads. I know it could be a structural integrity issue on some acrylic tanks. If I was running that large of a tank I would look into Reefflo pumps, have used them in the past when feeding two tanks from my basement sump system. Not the most economical but plenty of power when we are going this big does that really factor in. Couple darts one for return one for cl would probably work.