cb
Member
I recently(9 days ago) upgraded my tank from 20g to 40g.. I also added a deeper sand bed (31/2 in) before I upgraded I was having a problem with high nitrates they were off the chart but since I had 4 damsels a cc starfish and a few hermits and a anemone in the small tank I thought it might be bio load. I still have the same amount of fish in the larger tank have not added anything new am going to wait for a while and the nitrate level yesterday was at about 20 so will they go down in about another week or do i need to do another water change( added 20g new water when I set this tank up) the other problem that i am having is a brown algae bloom. It is on the glass and the sand and the rock am I going thru a cycle or is this something I need to address.