To those of you that said Bolivians and blues can't be kept together or shouldn't be kept together, you must not have any experience with rams because they are perfectly compatible. As already mentioned, pH doesn't play a huge role in water chemsitry. I've kept and bred blue rams that were wilds, half wilds, and others as well (F5's, etc.), and I can tell you Arkangel that pH plays a very insignificant role in the setup of a tank. My wilds were spawning in a pH of 8.0 and a GH of 300+ ppm and fertility was 90-95% or more for my pairs. Doing regular water changes and keeping the water fresh is more important than an acidic pH. My wilds thrived in those conditions. My discus and angels are fairing just as well.
I wouldn't keep the temps of the tank higher than 84 degrees. Any higher than that and you will notice that your rams will start to turn pale (sign of stress) from the higher heat. Not to mention, if you want plants the temps should be on the cooler side of their range anyway.