Hey Duck...Welcome to AquariumAdvice.com!
Sounds like you have a number of problems going on. As mentioned, nitrates are too high, Ph and temp are too low. What are your other parameters? Ammonia, nitrite, SG
? How old is the tank and what do you have in it for livestock? High nitrates come from either over-stocking or over-feeding. Some more LR
may help boost the biological filtrartion to handle the nitrate. Water changes using RO
water will also help. A "buffer" just helps maintain a consistant ph
and maks the ph
less resistant to change. Most prepared salt contains good ph
buffers. Water changes will help with this as well (using RO
water). How is the leather doing to day?