Should i add a layer of ADA amazonia powder to lower ph
I have a 5gallon hex tank that is planted with Wisteria, HC, and soon to be pellia and riccia. I use eco complete for substrate, trouble is i have hight ph here in houston. My tanks ph is like 7.6 right now and i have diy co2.
Would adding a top layer (like 1/2") of aquasoil powder do anything to lower the ph. Would it be enough to bring it down to 6.5 or 7? I am wanting to get some CRS or CBS and know they need a lower ph to do alright.