Join Date: Oct 2010
Location: Victoria, Australia
The only problem is that if the KH is really high, peat and IALs may not be enough to bring it down. Our water has a fairly low KH here in Melbourne, so it is much easier to get a lower pH. I think those with a high KH, usually use a mix of RO water and tapwater for their softwater fish.
You might be overstocking a 10 gallon tank if you have one of the commonly sold pleco species, as well as a group of wilds. Even bristlenose plecos ideally need at least 15 gallons. I have a fully grown bristlenose and it is a decent size.