Hi i am a newbie my name is Daren and my plan is to keep a small shoal of about 10 cardinal tetras (and maybe 2 or 3 bronze catfish)in a 64 litre tank. However I tested the water straight out of the tap and it was 7 but when left for a week or so it goes up to 8, I think this is to do with the carbon dioxide coming off. Is this going to be a big problem, I have read a lot about PH on the net and half of it cotradicts the other half. I don"t really want to spend time and money chasing a PH value but would rather get fish to suit my PH (cichlids too difficult for newbie?).Thanking you in advance Daren.