Whats a pH scrubber?
co2 scrubber is just a basic container that filters the incoming air to the skimmer. air goes through soda lime. and basically puts "clean o2" into your skimmer.. and lowers the co2 levels in your aquarium. i actually have two.. so if someone wants to try it.. i have plenty of soda lime etc. imo a must for anyone using a calcium reactor.
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