BASE WAVEPlanaria Trap (Pack-2) Leech Trapper for Aquarium Cherry Shrimp Crystal Red Shrimp Dwarf Shrimp

Worthless as they float, won't stay submerged. returned

I've tried numerous traps over 2 months with varied types of bait. Don't waste your money on them. I never caught a single planaria. Buy nano fish that will eat them instead.

Works well for scuds, just wish it was designed with a way to take in and out of aquarium without getting wet. Maybe a screw on lid so you could add a line without pulling the lid off.

Not sure how these could be effective when, even though I make sure they’re filled with water, they still manage to float.

Didn't really work...

I bought this for detritus worms which were taking over my tank due to a large plant die-off. It seems to work pretty well for that. The only thing is its a bit tricky to load with bait, which was some fish food in my case. You basically have to make it so that there are zero air bubbles inside or else it will float. The best way to load it is to open the two halves, load one half with your bait, then while holding both halves together loosely, submerge the trap in your tank water. The water will flow in, and the air out, through the small crack between the halves. Then close the trap completely while still submerged. The first time I did this it was a little sloppy and I lost a ton of fish food, which quickly got blown around by my filter. Not great when you have a bunch of worms feeding off the stuff.