I don't know. I don't get them all wet and I keep them out of the sunlight and I don't feed them after midnight. LOL. I keep them clean but the lcd or electronics Craps out. I just payed 60 bucks for a PH probe for the Hanna. Then I thought it was bateries but not. I will try manufacture to see what I can do.
LOC NAR1958 Reviewed by LOC NAR1958 on . limited buget: ec meter or ph meter which should i buy first or is litmus paper sensitive enough?:confused: Rating: 5