Ok, so some background information. I purchased a biocube 29 last week and got it setup on Tuesday with live sand from LFS and water I made with RO water from the grocery store and instant ocean aquarium salt. Saturday I added 25lbs live rock I purchased from a forum member who had half in his sump and half in his display tank. Rock was transported home in a bucket of water from his tank. At the same time I added the rock I also added a maxijet 900 powerhead for extra flow. Sunday I added a table shrimp to get the cycle started. The lighting is a retrofit kit from rapidled. Tested for ammonia and nitrate yesterday and today and got the same reading ammonia looks to be about .25ppm and nitrates 0. Good right? Well over night I had something pop up and I'm not sure if it's good or bad. Can someone help identify?