High Range pH, Nitrite questions

[jt325i]

I've had my tank up & running w/plants for about 2 weeks now. 10 days since I put the fish in (3 small barbs). Ammonia is presently at 0. pH is reading between 6.6-6.8. Do I need to bother with the high range pH since it only seems to apply to 7.4 & up? Also, now the nitrite levels have increased somewhat - about 2ppm. Just did a 25% water change. What level do I need to keep it at in order to not endanger the lives of my fish?

[OrionGirl]

No, the high level pH test won't help--it will just give the lowest value it can.

For nitrites, I would keep them under 1 ppm. Water changes as often as needed. The addition of salt will help reduce damage to the fish, but I am not sure on the theraputic level needed. 1 tsp per gallon? It will help, though not eliminate gill burn.

[jt325i]

Thanks..... I won't bother messing with that test if the pH remains below 7. I'll keep an eye on the nitrites & try to keep them below 1ppm until the tank cycles.