I agree that most fish can be kept across a wide varity of the Ph spectrum, however ... I have found (through experience) that my fish look MUCH better when kept closer to their native Ph. A great example of this is many of the tetras. Given soft, slightly acidic water they look fabulous, far more than when I have kept them in more alkaline conditions.

Your tank sounds all good.
As it's a new tank don't forget to keep up with the regular water changes. (10% normally, but with a new tank maybe a little more)


If you are using bottled water remember to have a look at the analysis as some bottled waters are very high in nitrates.

Hi, I just added my first set off fish to my 70L tank - 5 neon tetras and two peppered cory cat fish. I tested all the water levels before putting them in and they were fine. The fish have been in a couple of days now and the nitrite level has risen a bit to 0.25. Is this just normal having put my first set of fish in. Do I need to do an extra water change or anything? thanks annabel X