After battling a stubborn flatworm infestation in my reef tank, I decided to give Salifert Flatworm eXit a try. Let me tell you - this stuff works FAST. Within 30 minutes of dosing, I watched those pesky flatworms start writhing and dying off. It was like magic seeing them disappear from my corals and rocks.

The product is incredibly effective at its main job. However, there's a serious catch you need to be aware of. When flatworms die en masse, they release toxins that can crash your entire tank if you're not prepared. I learned this the hard way when my skimmer went crazy and some sensitive corals got stressed.

Here's what worked for me: First, I siphoned out as many visible flatworms as possible before treatment. Then I dosed exactly according to instructions (10ml per 300 gallons) in a high-flow area. Having activated carbon ready and planning a large water change immediately after treatment saved my tank from disaster.

One surprising benefit - it also wiped out some zoa-eating nudibranchs I didn't even know were in my tank! Most of my corals were irritated for about a day but recovered fully.

Important note: This is NOT for freshwater tanks (as some reviewers discovered). And if you have a massive infestation, consider treating rocks separately first to avoid overwhelming your system with toxins.

While powerful, this treatment demands respect. Follow directions precisely, prepare emergency measures, and monitor closely. When used correctly, it's the most effective flatworm solution I've found - just be ready for the nuclear-level cleanup operation that follows!