Low ph help
Hi guys... any ideas what is causing my ph to bottom out (6.4 today). All other parameters are perfect, PH out of faucet is 7.0. I even just did my 50% water changed yesterday. Anything about the following set up that jumps out at you that might be causing it? Only in this hobby for just a couple of months and any help would be greatly appreciated.
16 Gal all-in-one Aqua Japan Cube
GLA pressurized co2 set-up
Kessil led lighting
Local fieldstone (which looks like it might even have a little quartz streak in it)
1 Betta, 2 Amano Shrimp, 2 Nerite Snail
Seachem Products: Prime, Flourish & Stability