qt tank

[Dewey]

In the artical it says to ad de-chlorinator to tank before shutting down.What is de-chlorinator ? Thanks Dewey

 

[reefrunner69]

Dechlorinator is a product that removes chlorine from the water, typically the active ingredient is sodiu thiosulfate. The reason to add the dechlorinator is to be certain that all the traces of bleach (hyperchlorite) are removed and there is no danger of residual bleach.