sump

[caribian1]

my sump its getting all green and with brown alge its that good or bad and if the sump its like that my main display tank could get with green alge or brown alge or it will stay in the sump

 

[BurntOutReefer]

it will spread as alage is free floating.....do you have a UV? if not, maybe throw a snail in your sump......