Testing display tank water for ich?

[manfish]

Ive just been going through a fallow period after an ich outbreak. Its been 76 days, but I was thinking of taking out 20 gallons of water out of my display tank and putting it in a clean quarantine tank and then adding a black molly in there to see if there's any ich still present. I figure it would be a better idea than adding the black molly to the display tank to find ich is still present and then have to go another 76 days fallow!
Any thoughts?

 

[MONTANTK]

Probably would be a waste of time. 76 days is a pretty long period without fish. Even if ich was still in the system, the likelihood of you siphoning it out and it hosting a molly are incredibly slim. Plus, the molly could have had ich already if you’re buying it from a store. I’d add a hardy fish (quarantine it first of course) and then drop it in the display and you’ll be good to go!

 

[vabben]

Could send in a water sample to AquaBiomics.

AquaBiomics

Microbiome testing for aquariums and aquaculture

aquabiomics.com

 

[Uncle99]

Maybe the ick never made it in the 20g of water pulled, buts in the sand in your DT.
76 days is pretty safe.