I purchased a tank off of Facebook marketplace. I was understood it to be a cycled tank. But when purchased I was only given 5 gallons of the water. There for I made all new water. I know my tank is acting a little funny and not opening up like it should. I bought the regular test kits and all my parameters are golden except, my ph is slightly lower than I’d like 7.5-8, and my ammonia is thru the roof. Yesterday I did a 70% water change and added like some fast cycle stuff the store gave me. This morning I check ammonia again and it’s thru the roof still. Need help.