Critique my new scrubber...

[Zagzoo71]

Am i on the right track here? I just cleaned 1/2 my screen got about 1/4 cup between the two sides. Look at the pictures the bright green took a razor blade to clean it off, rest cleaned off with a credit card. The bright green good or bad? All the rocks in my tank just went thur a major leech (all were new dry rocks).





Thanks...