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I have two freshwater tanks stocked with soft water loving fish and live in a hard water area. Over time I've been working to lower PH, KH,and GH as gently and naturally as possible. My strategy has been planting heavily to reduce KH via CO2 uptake from plants, Indian almond leaves and bogwood, and mixing in a % of RO water with tap water, re-mineralising where needed to prevent crashes. Currently the tank stocked with a plec, corys, candy loaches, black emperor tetras, dwarf gouramis, rams, and golden wonder panchax is PH 7, GH14, KH 4 - ideally the KH remains stable in there and PH and GH go down just a bit. the tank stocked with plecs, rainbow gobys, female bettas, and cockatoo apistogrammas is less established. PH 7.4, GH 17, KH 7. In that one the PH would ideally go down below 7, KH down a little, and GH down a decent amount. Any suggestions to continue moving things in the right direction without using harsh chemicals and shocking the fish?