Garden hose filter

the chlorine / chloramine in your water is not high enough to cause any negative effect. Chlorine wil absolutely dissipate quickly -- light will break it down very fast, ask anyone that owns a pool. you'd do better leaving it out on a sunny day on back deck for 3-4 hours then leaving it out 24h in your basement.. could be wrong but i bet it's damn close. Sun absolutely catalyzes teh gassing off of Cl-2 (elemental Cl). Chloramine will not gas off easily. Leaving water with chloramine out for 2-3 days won't do shit. What's worse is stagnating your water for 48-72h. Whatever positive getting rid of minute amounts of chlorine/chloramine will be far offset by the negatives of leavinag water standing around for 2-3 days. Even if you put bubblers in or something that stirs the water. the ppm of mg and ca in your water won't be so large that a minor adjusment to your fertilizer can't fix. if you do want to filter the water, you may just need to boost whichever component of your fertilizer has the most Ca in it without putting anything else out of balance. i do things they say you shouldn't, lol, like using softened water. I switched a few years ago. My unsoftened water is 300ppm or higher. I didn't need any adgjustment in my formula since that switch. I lost some portion of Ca/Mg for sure with very hard water but it must not have been large enough in proportion to what my feed adds. YMMV. Keep notes and adjust as necessary. This is a trial and error context.. nobody wil be able to tell you for certain given all the variables at play that differ from one house/region to the next in regard to water. RV filters, garden hose filters.. some cheap ones are out there... no idea how reliable they are. might only reudce 1/4-1/2 of dissolved minerals, i'd wager. Need an RO system to do it right. try i.. do one pot with your OCD behaviours and one whre you don't care.. prefereably clones so you don't wrongly attribute what was really caused by a slower growing plant to 'chlorine.' Its the same thing with the people who think flouride int eh water has some negative effect onthe human body. Not while we live eto 80-100 years, anyway, lol.. maybe if we start livign 150-200 years we'll have to revisit that question. Same with potted plants. Maybe, a mother plant that stays in the same pot forever is a different context, but a 4-6 month long grow cycle won't matter.