I want to make sure I do not shock my fish! So I bought some Pond Prime that is a lot more concentrated to save a bit of money on dechlorinating. The instructions say use 6 capfuls for 600 U.S. gallons. So one capful per 100 gallon. I take 5 capfuls of that and add it to an old, empty Jungle Start Right bottle I have. I top off that bottle with reverse osmosis completely dechlorinated water. That bottle is listed as being 236 ml. So, with the 5 capfuls having the ability to treat 500 gallons, and that being divided up by 236 ml, each ml I use has the ability to treat a little over 2 gallons. Let's round down very slightly to two. So that would be 2 gallons per ml of liquid in that bottle used. Now, the Jungle Start Right bottle says that one of ITS capfuls holds 5 ml. So, for every capful it treats 5 *2 = 10 gallons. So one capful for each 10 gallons. That is a very slight overkill (based on my rounding down to 2 above), so since the Pond Prime says you can overdose double or even more sometimes, I could use a bit more than one capful for 10 gallons likely without problems, but do not want to overdo it too much as I've witnesses what can happen if you do. That sounds about right? Thanks!