
R2R
Glad you joined our crew! Best of luck to you with your aquarium! Welcome from the center of the State! As for the number of fish for a 30 gallon tank...it’s depends on the size of the fish, however, I wouldn’t go with more than 4-5, the size of a Clownfish. The white spirals are Spirorbid Worms and are completely harmless and good for reef tanks. They are filter feeders that catch small plankton and particles of food. Are your Clowns a true pair? Are they the same size? All Clownfish are Males, then the dominant one turns into a Female and gets much larger than the male.