Have some weeds in the tank (pond) that look like chara but are not that. Also water is extremely clear so I know it needs fertilizer. Should I hit it with cutrine plus granules first, then fertilize? The weed is grassy with no odor and just looks like a sort of grass. Any suggestions from not much info? I am sure the grass is growing because sunlight extends so far down. By the way, I have 8 carp in there and it is a 1.5 acre tank in central Tx. Bass, Cat's, and many bluegill are doing well and in all sizes.
