I'm cycling my first tank using a shrimp to kick off the cycle. The shrimo is in some panty hose to keep it from making too much of a mess as it decomposes. The shrimp has been in for about 2 1/2 days and ammonia is already spiking. There appears to be a large growth of white mold on the panty hose(see image below). Is this normal? Should I be concerned? Should I remove the shrimp? If I leave the shrimp in, how long should I leave it?