I woke up this morning to feed my tank and none of the fish were visible in the water column. Only my blue lights were on so I waited for the whites to come on and still nothing. Finally my tang emerged and was feeding as normal. I found my clown fish on the sand bed, hidden and he's gasping and looking very ill :-( no signs of any spots of marks on him. I have since found the chromis dead. I have moved around as much rock work as possible and can't locate any other fish. I have 6 fish missing. All my corals look the same.
Unable to test nitrate/nitrite
System is about 15 months old. Only home made RO
Any help would be appreciated. Totally gutted
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