is there anything i can do to make my severum brighten up? he is at or close to 4 inches, and constantly a solid black, and i do mean BLACK. the gravel is natural colored medium sized pebbles, there is a large peice of mopani drift wood and TONS of fake plants to hide in, its a 35 gallon tank. tank mates are 2 other smaller severums m/f (who are both different shades also, one is always silvery with lots of black stripes, the other is showing typical solid silvery-green with spots and stripes with red fins) a pearl gourami, a platinum gourami, a school of danios a school of white clouds a school of blood fin tetras, a synodontis catfish, and (temporarily) 6 1 inch convict fry i'm growing out. minimum of 50 percent water change at least once a week, undergravel filter, ad i think a 75 or 100 gallon filter. temperature a steady 78, normal chemistry, and no aggression in the tank. they are fed a combo of frozen foods in the AM(brine shrimp, spirulina myosis shrimp, bloodworms) tubifex worms 3x a week, and omega one super veggie flakes in the afternoon and evening. you can see him face on in the pic, the water is brown because of the drift wood( its time to change the carbon
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