How long do you wait to put back your fish after using tap water dechlorinator?

It is generally recommended to wait at least 15-30 minutes after adding tap water dechlorinator to your aquarium before adding back your fish. This allows time for the dechlorinator to effectively remove chlorine and chloramine from the water.

Following the specific instructions provided on the dechlorinator product label is also important, as some products may have different recommended waiting periods. It's always better to err on the side of caution and wait a bit longer to ensure the water is safe for your fish.