I'm <"not a CO2 user">, but I wouldn't be too concerned. Have a look at @Roland 's tank and water parameters <"Soft water tank"> & <"What's the deal with kH/Alkalinity?">.My degassed tank pH is 6.6 due to aquasoil also buffering pH
My concern is lowering pH to 5.6 with co2
GH - 6
KH - 3-4
Should I be concerned or not
Doesn't fit together. You can get these parameters if CO2 content is between 25 to 35 mg/L.My degassed tank pH is 6.6 due to aquasoil also buffering pH
KH - 3-4