Gh/Kh vs aquasoil

[j.smet78]

I planted my 90p saturday, set the Kh to 2 Gh to 5. Today is measured again and found Kh had dropped to 0 and Gh to 3.
Did i misread the tests on saturday or is this due to the ability of aquasoil to lower the Ph? I didn't realise or notice before it could buffer those in such a way.

 

[wearsbunnyslippers]

https://www.adana.co.jp/en/contents/support/substrate/manuals/AQUA-SOIL_WEB.pdf

 

[PeerUnk]

Yes, aquasoil buffers minerals, so KH (and GH) can decrease and therefore your pH is lowered when CO2 level is the same.

 

[j.smet78]

Thanks for your replies!