IME the manual timers from Coralife are junk. Seen more broken than working. I have 2 of the digitals though and they have been fine for almost a year now.
I too have been having problems with the dual manual timers. I have mine under the tank & IMO, I think "salt creep" may be a contributing factor with them "breaking" . I used "Salt Creep Eliminator" on it this morning to see if that helps.
i have had a single manual for about 7 months with out any problems although i now looking into cycling a some ph so i need to get something so i can cycle them back and forth.
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