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so i have brown algae on my vals my hygro and water sprite are fine . butt the current kinda has a current going threw it and brown growing crap is growing all the time on my vals . i have a xp4 running in a 75 gallon should i go back with my fluval 404 does this matter . our what should i do my ph and kh are good i just dont under stand there getting 8 our so hours of light . and blue marine glo at night is this to much . should i get them on timers and this would be better . help