Snails would take an awful long time to starve normally... Excel's active ingredient is an industrial cleaner that just so happens to work as a carbon source- it kills algae, which I suspect is what kills your snails by starving them of algae.
YEAP, more specifically a Clown Loach ( I know I KNOW "you need to have more than one in the tank) LISTEN go to petsmart or petco, or if you have a lfs that you have a good rep with buy one and once it is all fat and happy take it back. They would love a bigger Clown, I'd say give it about 1 1/2 months and NO MORE SNAILS
why take the risk of introducing possible illness to your tank from the lfs? It would be a bit ridiculous to quarantine the loach for four weeks, then put him in your tank, then back to the lfs. And also can't be very pleasant for the loach.
As it is clown loaches get picked up by uneducated keepers and plunked into a 10g and then returned whrn the poor thing grows up, or dies from improper care... Why encourage this revolving door practice?
/rant (sorry, got off topic there...)
1. My 2 LFS (not box stores) Quaratine already, so why Quaratine longer? You can not go into my my 2 lfs and buy fish that just came in, they Q them for 6 to 8 days.
2. I didnt suggest she buy it to keep it, I told her to buy it and take it back. WHICH is a practice some do here.
I think i found a way to get them. I did a water change last night and must of hit the ph controller or something. when i got home from work today i looked at the tank and all the fish where on the top gasping for air. So i turn the controller up a little and moved the power head to wards the surface. I then noticed a big pile of something on the glass at the top of the water and it was all snails. Looked around and found three piles of them and i crushed them all. So i am thinking about once a week pull the fish out and turn up the co2 and wait for them to come to the top. Anybody ever heard of this?