tank emergency !!!!!
this morning I find my regal tang breathing hard . So I start checking
all levels in my 40g tank . I find my PH is Way Low ........I mixed up some new water and tested it .......and the PH in it is Low too ?
So I tested another tank I have , and the PH is fine .
How do I get the PH up ? or should I just take from my 20g for now ?
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