You should use RODI
water for all PWCs. Sprint water contains who know what as far minerals are concerned. Distilled water would have been the better choice.
As Kurt said, a 100$ water change is a bit drastic as the rock, sand etc. wil be dry for a period of time. I would do several 50% water changes over a weekend instead. That should get your nitrates down to a reasonable level. Under 40 is fine for FOWLR
, under 5 is the goal for a reef tank but that takes time, tank maturity, pwc
's, macro algae, etc. to accomplish.
My tankl also hit 8+ for ammo when I first cycled it. I used a lot of uncured LR
and added a couple of shrimp too. No big deal, just a longer cycle. You are near the end of yours. Good luck. Just go slow and you should be fine. Oh, and ......