Folks
Please note that I did not pick up on the 20G
I generally agree with theotheragentm but several comments (and my comments are based on a 110G tank).
Background
I received my gift of the pesky little devil variety snails in purchased plants.
I first noticed several on the walls of the tank.
(I now believe that at that point in time I could have controlled their population via manual removal).
I did not believe that these few would be a problem (note that I said observed as at that time I did not realize what I was dealing with).
Virtually before I knew it these snails were all over the plants and walls as well as their egg sacks and the density was such that viewing the interior of the tank was not possible.
Getting a fish to take care of your snails is a bad idea.
My procurement of seven juvie Yoyos was first class as within several weeks no snails could be observed.
Fish that control a snail population, destroy a snail population.
Not in my experience.
When I vacuum the tank floor most of the detritus is very small snail shells.
These little devils are still present in the tank but are too small to be observable and/or hidden under plant leaves, in holes in rocks, wood, etc.
You will end up having to care for the fish and finding it other food sources.
Absolutely but my Yoyo's are, IMHO, very pretty fish.
Even though there are smaller loaches, you are going to need to keep a school ideally as they are schooling fish.
Yes.
I started with seven juvies but due to a real bad episode with sudden death syndrome of my bottom dwellers I lost four when they had grown to adult size.
The remaining three still run, jump and play with each other as well as occasionally with my sterbai but more often with my SAE's.
I absolutely do not recommend purchasing only three Yoyos as mine were raised together as well as with the sterbai and the SAE's from juvies as under typical conditions I believe that five is a minimum number and seven a preferable number.
There isn't enough room unfortunately. I would go the snail trap method.
As I indicated previously I absolutely agree as I did not pick up on the 20G for the loaches and, although I have never used trap methods, I believe that those set forth by theotherarentm will function very well.
TR