Mine is a 300 gallon Rubbermaid stock tank. It is under my tank in the crawl space. I put it there before I built the house.
An Iwaki MD-100 RLT pump powers all the filtration and the return. Filters include:
Six-Biowheel DIY
Bucket-o'-Bioballs DIY wet-dry
Merlin fluidized bed filter
Ancient Eheim 2017 with an irreplaceable broken impeller
I also have it set up so I can add tempered well-water from the house without having to go down in the crawl space. There is a sump pump for the overflow that empties to the septic system.
Indeed. Lol.
That wasn't actually the sump for that tank. I just threw it together real quick out of spare stuff I had lying around. I was testing the makeshift bulkhead fittings I installed on that 1g tank.
I ended up building a wet/dry in a 5g home depot bucket for that tank. Lol.
Ill see if I can find the pics.