Removing salt treated water after treating ice

[S Gott]

I treated my 29 gal freshwater tank with aquarium salt to get rid of ich.  I treated the water for 3 weeks and no longer see any evidence of ich.  I have performed one 30% water change, replacing with water that does not have salt.  How many more times do i do this before i can add my pleco and nerite snail back in.  I removed them to a 5 gal tank prior to adding the salt.  i want to be sure the salt level is reduced enough to not harm my pleco and snail.

[CanadaAmanda]

I don’t know the answer but I think whoever does will need to know how much salt you had in there?

[Vince G.]

I would say you are safe to put both the snails and plecos back into the tank whenever you feel comfortable. Nerite snails live in salt water so it does not bother them at all and I have treated tanks with salt up to 1tbsp per 3 gallons and had no issue with plecos being sensitive to it. When your removing salt from an aquarium you can just use the amount of water you remove as a judge for how much salt is left. If you changed out 30% of the water then you can assume 30% of the salt has been removed from the tank.