Let me start by saying this product is NO JOKE. When my reef tank got overrun by those pesky rust-colored flatworms, I was desperate. I tried siphoning, starving them out - nothing worked until I gave Flatworm eXit a shot.

The good? This stuff WORKS. Within 30 minutes of dosing, I watched those little pests go nuts before dying off. My corals were pissed for about a day (totally normal), but everything bounced back fine. The key is FOLLOWING INSTRUCTIONS - have carbon ready and prepare for a big water change.

Now the scary part: flatworm toxins are no joke. One user lost fish because they underestimated their infestation. My advice? If you've got a serious problem, consider treating rocks separately first. The mass die-off can crash your tank if you're not careful.

Interesting discovery - it also nuked my zoa-eating nudibranchs! Bonus pest control I wasn't expecting. But freshwater hobbyists beware: multiple reviews confirm it DOESN'T work on freshwater planaria.

Final verdict? 4/5 stars. It's incredibly effective when used properly, but demands respect and preparation. Not for beginners or faint-hearted reefers!