Ph of slightly acidic to neutral should be fine. The key is consistency and CLEAN water. Tigs (specially juveniles) are sensitive to elevated levels of nitrates and of course, ammonia.
I agree with Tainted, blackworms are great starter food.. a healthy juv tig will eat bw until its stomach is swollen. Another great starter food would be guppies. Quarantime some for a week then introduce them in the tank with the tig. They are a semi renewable source too because they will certainly breed in that tank.
Have fun.. tigs are fun fish to grow out.
PS: They will at times do that non stop swimming up the walls. Its perfectly normal.