Best Tank Mate?

[HCpetraitis]

I have one ADF but when he passes away( hopefully not soon) What should I buy? I don't want ADFs anymore and I've had Apple Snails but I don't know I want something new. What should I get?

 

[TylerFerretLord]

Tank size?

 

[HCpetraitis]

10 gallon with filter,heater and I have 4 mollies and 4 platies.