I watched a video sometime back, while I was working out my design, where a guy’s drain got clogged and he accidentally dumped his entire system onto the ground overnight and lost a number of fish. Based on this, I created my system where there is no pump inside my fish tank. Essentially, it stays 100% full at all times with an overflow that exits into a recessed 55 gallon barrel (sump tank), and from there water is pumped out and up to the garden, where it eventually drains and returns back to the fish tank itself. That way, there is no reason the water in the fish tank should ever sit below the level of the overflow. It works really smoothly, and I was feeling pretty great about it. However, there was a small catch in making sure that I keep fish from draining from my overflow into the sump tank. I thought a perfect solution was to cover the overflow with window screen material, and that seemed to work flawlessly about a week’s worth of testing. But… that was pre-fish! Yesterday, after the fish being in the tank for a few hours, I noticed that some waste material was collecting on the screen, but water was still flowing. I left the house for a couple of hours to play volleyball last night, and when I returned I found that screen had become so clogged that it couldn’t keep up with the water coming back from the garden. Over a that 2 hours I dumped about 35 gallons of water out of the system, and when I took the lid off my sump tank, I found that my pump was danged close to running dry!
Where did you get your 55 gal aquarium hood
Aquarium Canopies & Hoods| That Fish Place - That Pet Place
Marineland Perfecto Glass Canopy - 36 in