i have a brownish substance growing along my glass hard to see straight on but can see it at an angel. Is thing something i must clean or could i get snails or something to help?
Sounds like diatoms to me as well which is perfectly normal and expected with a new tank. The astrea snails won't do anything about diatoms (nothing really does) but still a good idea to have some. The diatoms will go away on their own assuming you keep youe water parameters in chech and your water source does not contain silicates. Good RO/DI water will not have silicates.Sounds like a Diatom bloom. This is normal in a newer saltwater tank. If your tank water perameters are good I would get some astrea snails. Don't worry about them reproducing heavily. That happens only with some fresh water snails.