So I bought a whole setup from a buddy of mine, 110 gallon. I understand the nitrogen cycle and I had some little guys from the fish store to help start up the process. The friend that I bought the setup from had things come up and needed to bring all of his fish to my tank (still new so dont know all of them, but lots of cichlids, a python eel, ropefish, few plecos, highfins, and a few other random guys) but also brought his filter, so combined with mine I have enough filtration going on for 250 gallons in this 110 gallon tank. He expected not to have any detrimental effects with the chemicals if we used his gravel and his filter. Yesterday, my ammonia was 1.25ppm, nitrite 20ppm and nitrate 40ppm, pH 7.8. This morning my ammonia was 0.25ppm, nitrite 40ppm, nitrate 10ppm and pH 6.8. I added some malawi buffer to increase the pH, but was not sure if my chemicals were reacting in the way they should, as I am only familiar with what they will do in a natural cycling process. Any tips or thoughts on if this is good or bad response, or ideas on how the fish will fare over the next week or two would be very appreciated.