BrackishAqua
Aquarium Advice Apprentice
Last month i switched over my 75 gallon into a 125 gallon. 275lbs aragonite sand 100lbs base rock. used the same overflow tank filters and such so there was only a mini cycle for 6 days. I added the fish and they love the new space. Had a nice diatom bloom and that has since subsided, but this morning there were circles everywhere growing through the diatoms. Heres a picture of one in the sand bed, same exact thing all over the base rock. what could it be? my sg is 1.013 ph 8.2 nitrate 80ppm i just recently got the phosphates down to around .5ppm with rowaphos. I use tap water with prime and instant ocean salt.