You should use sodium thiosulte: "Obtain a clean one gallon jug. Dissolve the 500 grams of Sodium Thiosulfate in a large pitcher of lukewarm tap water. Stir until all the crystals are dissolved. Then transfer the solution with a funnel to the gallon jug. Top off the jug to make a full gallon of stock solution. Add 2 drops of the stock solution per 1 gallon of the water to be treated. One gallon can treat 37,850 gallons or more."So far it reeks of chlorine so I'm going to let it sit for a couple days then test it to see if there's any chlorine on the water.
Id put a liner in overtop...not much for a catfish to poke an arm through a stock intex liner. The liner solves ur chlorine removal problem also.
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You should use sodium thiosulte: "Obtain a clean one gallon jug. Dissolve the 500 grams of Sodium Thiosulfate in a large pitcher of lukewarm tap water. Stir until all the crystals are dissolved. Then transfer the solution with a funnel to the gallon jug. Top off the jug to make a full gallon of stock solution. •Add 2 drops of the stock solution per 1 gallon of the water to be treated. •One gallon can treat 37,850 gallons or more."
This will neutralize all chlorine residue. Dilution via water doesn't always rid all residue. I would even go as far as doubling the dose to be extra safe.
This stuff is also dirt cheap thru Kensfish http://www.kensfish.com/aquarium-supplies/water-treatments/sodium-thiosulfate.html
Totally agree I need one. But rpe isn't cheaper from what I found... I can get 40mil epdm 25'x25' for $390. Same size rpe is $500.
Everything else about it makes it worth it, but just thought I'd share