the 45 gal has 4four 4 inch . goldfish, four green cats, one plecostama. back filter, been set up for about two months. always messing with the tank. been two weeks since water change. put baking soda in about once a week due to high nitrite, totally yellow when read
ten gal has around 20 females, guppys. back filter and undergravel feed three times aday on all my tanks including the 45. water change about one fourth once a week.
my 20 gal hex has around 30 baby guppy fry. feed four times aday. different things. back filter plus undergravel. fight alkaline water in alll tanks. i do not vacum the gravel but put my magnem on for a few days. util clean. judy