I want to raise german blue rams in my tank. my tap water is about 7.5 ph and i need to get it to 6.5. its a 42 gallon hex tank and i will be using DIY co2...the guy at the LFS suggested adding fluval peat granules to my canister filter. he said with the addition of the peat and with my co2 then i should be able to keep a stable ph of 6.5 or so which is what the rams need. has anyone tried this before? does this effect plants? the package of peat says that it is wonderful for plants but i want to hear it from an unbiased source. anything special i need to know?