about how many fry are there? If I were you, I would remove them to their own tank to grow. Fry generally dont to to well in those floating thingys. Get a small tank....5 or 10 gallons, with a hood if you can *but not 100% neccessary* A heater would be nice, and a corner filter, or a power filter...put panty hose or cheese cloth over the filter so they dont get sucked up if you use a power filter. Dont put any gravel in the tank...this way they cant get stuck in it. And its easier to siphon out. Give them some plants to hide in. As for the food. I hate that liqui fry stuff....but it does serve its purpose. I've never had it bubble up like you have. Tetra *i think* makes a fry flake....its more of a powder. Its pretty good. But what I would recomend for strong healthy fry is Microworms. They are cheap and supereasy to keep. If you cant get any locally, you can get them at aquabid.com Hope this helps some, and good luck with the fry. This is how I keep my guppy fry.