I am so thankful for all the great ideas-I have a new 125 gal.tank,12 catfish(various) 7 tetras and my sucker-I change the water 25 to 30 % every 2 weeks,and use filtered water. I have only 1 live plant,a jade that is attached to a rock. I will try cutting back on the food,and figured that the next cleaning will be really a good one,scrubbing everything down really well,etc. And I will see about getting another fish that likes snails,as there is plenty of room in this tank for one more!
Again,thanks to everyone for your help!
Again,thanks to everyone for your help!