Hi guys! I’ve got a 29 gallon tank currently... been up and running several years. Tested the water today and it’s currently reading- PH- 6 Ammonia- 0.25 Nitrite- 0 Nitrate- 5 Did a 50% water change 3 days ago. Obviously need to lower my Ammonia so I’ll do a small water change. However... I’ve never had 0 Ammonia and I think it’s due to low PH. How do I solve this issue? Thank you in advance!