Guppy's Fries Batch 2

My first batch guppy fries, 3 of them, has been living in the main tank now. I had the mother guppy gave birth to 20s new fries on 1st March 201. OMG!!! Soon my tank will be full. If I don't want these batches to breed I have to separate them into 2 tanks. I don't think my current tank can accommodate 26 fishes inside it.