i have two fish tanks at home and now have 4 large tanks on our property.. i've heard people rasing bgills and bass in large tanks.. should be similar as far as water temp, ph.. etc. .. i've had very good luck with a product called carbo plus.. i use it for my plants if you were considering cover for you fish.. .but 75 gal sounds right.. i'd love to have one.. setup up with about 4 bgills....

good luck

"Born to fish, Forced to work!"

2.3 acre, 1.5 acre, 1 acre , .5acre (bgill only)