What are you using for your tests? KH
*IS* Alkalinity, so it is kinda strange to see different numbers .... At any rate, KH
of 80 or 120 is adequate for most tanks so i won't change a thing.
80 gal FW with 30 gal DIY wet/dry/sump.
9 fancy golds, 1 hillstream loaches, 1 rubber-lip pleco (C. thomasi), 3 SAEs, small school of white cloud minnows, planted.