TKOS said:And yes, that is a common rams horn snail. I have heavily planted tanks and lots of these guys. They are greta fun to keep and won't hurt anything. Biodiversity in a tank is good.
Reduce feeding for the fish, clean the substarte occasionally, remove decaying leaves and algae and the snail population will stay low.
If you have soft water with a low kh the snails will never grow very big anyway as their shells won't develop.
Pond snails are flat spirals.
A better loach choice would be yoyo's. A small group would fit well in a 75 gallon and they get no more than 4 inches in size or so. Zebra loaches would be a nice choice as well.
You've got it mixed up TKOS, that snail is a pond snail. Ramshorns are the ones with the flat spiral.