Dallas tap water has high ammonia content. Go buffered RODI or plant the tank heavily with fast growing species to consume the nitrate.
Seachem Prime! ...watch the link below on you tube, although u may have to physically type it in cuz I was having trouble copying it .. it's helped my cichlid aquariums immensely : https://youtu.be/3UVzj1eCqcI
They may have some chemicals to help reduce them. Theres also some carbon for canister filters with other ingredients to reduce amonia and other stuff. Check it out.
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