Yup, Lesson Learned!!! Probably a long road to get rid of these little demons haha.Yeah, it's not hard to use too much GFO. It can be too aggressive, which is why I've only used a couple times. I probably only used half of the recommended amount when i did use it. If I'm dealing with algae issues, CUC, water changes, manual removal and time is a far better method. You can't fix things overnight, it took time to create the problem and it will take (and should) time to remedy the problem.
Anyways, didn't mean to hijack your post. Thanks for the reminder!