Hi thanks for responding, my pleco is about 2ā Iāve had him a lot longer than Iāve had the betta, but their equally precious to me. I did test my tap water today and the ammo is at 1.0 nitrate is5.0 nitrite is 0 and the ph is 7.6-7.8. So doing daily water changes is not helping to lower the ammonia any. I do know that they use chlorine in city water which causes the high ammonia, trouble is how to get rid of it. I have a 10 gal tank set up for them but havenāt put them in it yet because of the ammonia level. The pleco would probably be better in a 20 or larger, which I have but canāt set it up right now.Iām wondering if another filter in the 10 with a bio sponge would help. I do have some live plants in there as well.