AC Pan Tablets, Commercial-Grade, Gel Lock Tech: Long Lasting, Moisture Activated Slow Release, Non-Corrosive & Safe - No Residue, Pan Treat Tablets (1 Ton, 140 Pack)

So far these "pills" or tablets keep the drip pan flowing and mold away when the AC is in operation; recommend to treat at least 2-3 times per year.

I got these for my 5 ton AC unit. My unit is newer but we live in a construction zone with an open attic and that's where our unit is located. I put a few of these into my condensation tray and have noticed my drain is cleaner. Overall these are not the right size for my unit so I do use a few tablets but it does the job still. I would recommend these tablets but in the future I'd probably buy the larger tablets so I don't need to add as often.

These work great in the condensate tray in ACs. This bulk pack is a good value.