hey all! I just recently picked up my first tank. 90 gallons, it came with about 15 Cichlids. only 3 have survived the move after about a week. I did all water tests and the only bad test result was the water is hard(GH
411.7). any pointers on this? will it kill the last 3 of my fish friends? is it a bad idea to bring some red tail sharks into the tank this early?
thanks for any info