I just got back from being gone for multiple months had family taking care of my tank and I noticed super high nitrates like 64+ ppm and water changes aren’t doing enough so I have algae scrubber going now not sure if this is caused by the high nitrates or what but any advice could help the levels are as follows. 8.1 ph 10.3 alk 500 calcium and 1400 mag phosphate is around .14-.15