My ph levels are reading around 7.6, this is as high as my test kit goes so who knows if thats where it actually is, my substrate is daltons aquatic mix and then stones whch the packet said was suitable for aquariums which i got from bunnings down the same isle as the mix, ive poured malt vinegar over these and over the rocks i have in my tank and no reaction... i have a couple of bits of driftwood and even have a a stocking with 250g of peat in the trickle filter, any ideas?