I recently had the same problem. I lost most of my baby neons that way. I also had some small angel fish get stuck as well. Most people recommended a stocking. I tried it and it clogged immediately. I took one of those nylon net thingies you wash your pots and pans with [new of course]... Rinsed it well. I unrolled it [its a round shape like a donut] and cut and wrapped it around my intake tube. I secured it with rubber bands. Use the whole pad it will be thick that's what you want. The water will flow through it. I rinse mine every few days [lots of plant debris]. It works great. I have not lost another fish and i have 100 platy, guppy and swordtail fry in there now as well. My filtration is excellent. Good luck and i hope it works for you.