So now that my tank is coming to life....I noticed this mustard looking growth in a few different areas...I here everyone talking about aptasia and wanted to know if this was it in the making?
Hi, if this is a new set-up it could be the start of diatoms, these are a normal part of cycling your system and it will spread at first then die away. It might be worth adding a small CUC of Cerith snails just to assist in controlling it, also keep an eye on your nitrate and phosphate readings.