Currently I only have a lawnmower blenny and a percula clownfish in my tank. The blenny seems content snacking on my LR, so I only really need to feed the perc. Im feeding him formula 1 & 2 as well as some frozen carnivore blend (forgot the name). I put a cube in a small cup with some water from the tank, mash em into small pieces then feed with small turkey baster. Then I put the rest in a small fridge until the next feeding. Will this stuff go bad? Will I run the risk of feeding rotten fish food after a few days? I tried doing the same with some brine shrimp, but they looked darker than normal so Im not doing that again... What should I do?