I'm pretty new to the forum & have gotten some really good info. I started up a 65 gal tank on the 1st of February and did a fish-in cycle w/4 guppies. Everything was going good until the ammonia levels started climbing. The level went to 1 ppm so I did a 50% water change and dosed the tank with Ammo Lock. That helped but didn't get rid of it. I added Zeolite to the filter and that didn't seem to do much. I thought I was cleaning the gravel too much and backed off on that. I read an article that you can use Seachem Stability to boost bacteria levels and the next day the ammonia was 2 ppm! Did another 50% change yesterday, change the filter pads and the zeolite. Nitrates are 0 as of this morning and ammonia is back to 1 ppm. Where did I go wrong? I had a 35 gal before and never had this issue. Thank you for any tips, tricks, advice etc.