Join Date: Jun 2014
Location: Cape Coral, Florida
300ppm is about dKH=17, whic is consistent with your quite high ph of 8.5-9 (well, more consistent with about 8.3). Not sure what the 45 is, is that in ppm? That's a radically different number (about 2.5) and not at all consistent with the ph so high.
Without CO2, with decent aeration and absent other weird chemistry, KH and PH are related - higher KH, higher PH. CO2 dissolves in water to about 3ppm (+/-) and reaches equilibrium - more KH, more CO2 is reacting with the carbonates, less free Hydrogen ions = less acidic.
I'm not exactly sure what aspect of it you find "unique", so cannot comment there.
If your concern is the high ph, lower the kh. If this is your tap water, to lower that substantially consider switching to RO water -- that's too high to modify by adding stuff, in fact in general reducing PH by adding stuff is usually an exercise in frustration, the "right" way is to remove the KH, then the PH falls.
Latest tank build:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.