Possible tank mate for tadpole

[Magoop]

I say possible because of tank size being the limiting factor. (which is the main reason I ask, tank size)
I have a (as far as I know) northern leopard frog tadpole I adopted from work.
I clean out any uneaten greens at least 2 times a day but I know I cannot get everything. I was wondering if maybe some variety of snail or ghost shrimp would be small enough while still helping with the cleanup.
It's a 2 gallon tank with an undergravel filter, I change at least %10 of the water daily as I'm using a baster to remove any uneaten romaine, but I can and have removed more of there is an undesierable level spike. There is currently just a marimo in there with the tadpole.
There is also a 77 F small preset heater

Any ideas? I know this won't be a permanent habitat for them, not sure what side I would upgrade to, but I'm currently just trying to get the tadpole to near adulthood.

Sorry if I needed to put this in the herp board, please move it if it needs to be moved.
Thank you.

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[Watsonja4]

Maybe 1-2 Nerite Snails would work. I have 3 in my 5g betta tank and they keep the hardscape and glass spotless.

 

[Magoop]

Would one nerite and one mystery snail work? I'll be putting one nerite back into the brackish tank after I switch over to just one filter.
The main reason I want a different snail is to reduce the chance of eggs. Though I suppose I could get two and let them chill in the tadpole tank and see how bad it gets Its not a huge deal to me but less mess the better.
Acquaintance suggested a Corey catfish but I think that would be a bit of a size issue? I was looking more for a snail at any rate

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[Watsonja4]

Nerite snails do not reproduce in freshwater and the tank is to small for Cory's since they like to be in a school.

 

[Magoop]

Nerite snails do not reproduce in freshwater and the tank is to small for Cory's since they like to be in a school.

Yeah, that's what I thought about the corys...

The main reason I brought up the breeding because I do have a brackish tank as well XD.

I did get some trumpet/love bearing snails for the crawdad, should I set up a breeding tank for them so I can have a constant supply for him? I know they breed like crazy

That and a constant supply to help clean freshwater tanks

Should I do a seperate tank or just chuck them in with the tadpole?

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