our tap water is really bad, so we run through alot of water conditioner too. i have a 50 gal trash can (clean) with about a pound of gravel that came from an established tank, in the bottom, it also has a small filter that has run in an established tank for awhile, i fill the can add salt, and conditioner, lower the ph and let it sit for three days with the filter running before i use it, i also have a smaller bucket done the same way but with a heater for my discus and angels, the other tanks can handle room temp water and the discus tank also has different water parameters. i generally do changes every other week but i think i will try weekly for a little while and see what happens.