Back again
- Thread starter Polyaddict86
- Start date
my understanding is with the sump on top due to the smaller size if it's water level drops several inches when the power go outs the larger lower tank can accommodate the excess water easier than with the larger tank is on top
True but you still have to account for back flow. Makes sense though with the display being larger but if filled too much it will flood just like a below tank sump. Slap on some check valves and siphon breaks and reduce the risks.
Sand getting into the pump when the Polys kick it up would concern me.
Oh cool. I was thinking of a huge dct sitting on the bottom of the tank lol
I used a 400gph pump I picked up at the hydroponic store for $25. No head loss for about 5ft, mine was only 3' above the 75 so pretty much no head loss. The pump is kind large though not huge but bigger then a standard powerhead. I tried using a mj900 and 1200 both didn't have much left after trying to push the water up there.
Oh and as I said a couple pages back that if you don't have room in the tank to accommodate the water in the sump then yes you will deffinatly have an overflow. But if like you said your level is usually 3-4" below the rim then you'll be fine.
