So...I was sure I was battling with dinos again. I changed my lights recently and the dreaded stringy stuff appeared on my sand and rocks and started irritating my corals. So, I started siphoning the thing off, cleaning the sand with the eheim gravel cleaner, brushing off rocks twice daily and dosing peroxide at night. To day I saw a thread about how to identify you actually have dinos with the cofee filter method. So I strained some tank water through the filter, shook the cup and left it under a light for about 2 hours. This is the result. A very light brown trace in the water, not clumpy. So what do you all think? Is it dinos or not? And what should I do about it?