Thought that I had dinos as snails seem to die and have red /brown /green on the sand and rocks but its also on the glass and when I scrape it off it comes off in sheets which the tang and angels enjoy eating my no3 is very high currently 40-50, P04 0.25 all other stats are within NSW levels which I'm working on reducing tank is around 5 years old live rock 10 years plus any ideas what I have ? Edit not the best pics but before adding a diamond goby the sand was also red/brown the glass growth also looks very red under kessil blues .
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