My water is PERFECTLY clear ever since I added the second filter and I really want it to stay that way. I mean I can look into the long end of the tank and see no difference from looking in the front. I never had that kind of clarity with one filter. Yes it is certainly overkill, bit the 2nd filter was on sale for 1/2 price when AquaClear went from the 300s to the 70s. As you can see my tank is a little overcrowded and IMO
you can't over filter.
29 gallon tank...Two Aquaclear 70 filters (300's)
2- Giant Danios 2- Lemon Tets
2- Opaline Gouramis 1- Zebra Danio
2- Gold Gouramis 1- Scissortail Rasbora
2- Dwarf Gouramis 1- Rainbow Rasbora
2- Schwartz's Corys 3- Otos