I tired to get a pic but they are just too small but they look like this. Are they bad and if so what do I do to get rid of them?
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There is a better method rather than using FWE.I had a pretty bad infestation of FW. I used flatworm exit. Good product. I dosed one time and I could not believe how many flatworms there were. It looked like it was snowing flatworms in my tank lol.
I noticed there were still flatworms that made it even tho I killed hundreds to thousands. This was pretty upsetting. I then bought a yellow coris wrasse and haven't seen any fw since. Even in my sump which I thought was odd when b4 it was loaded. My only guess is the ones that lived were not able to reproduce after the fw exit treatment and slowly died out. This however is jus a guess as to why they slowly disappeared. Thankfully I haven't seen any in over 6 months.
The only tank inhabitant in my mixed reef that seemed aggravated was a few zoas and they opened up after a few days and were fine.
Would I recommend the fw exit? I definitely would but to be honest adding anything to my tank scares the heck out of me. When the fw die they release toxins into you water and if you have a plague this can possibly crash your tank. Have a water change ready to go and plenty of carbon for your canister. There's plenty of good vids you can watch about the flatworm exit.
Good luck!!! This is a fight you will win.
There's risks with any method you take. In my application I believed FWE was the best route and proved to be.There is a better method rather than using FWE.
Its the toxins that can and will crash a tank if not properly prepared for based on population.

What do you need to know? So far there is a small amount that I can see, they are on the glass right now.Oh no I am sorry that you have these.
There are solutions but a ton of info is needed about your tank and setup.
How many are you seeing?
+1 on these aren't the "bad" flatworms.Those white ones are nothing to worry about. They won't hurt anything and won't even really get to plague proportions either. Fairly common and cause no damage. Any wrasse will also pick those off easily. Not like the red ones, good luck finding any "natural" means for those buggers.
Anyway Flatworm exit will work perfectly and I've used it in my main display mixed reef with all sorts of different kinds of coral with no ill effects. I treated only one time but used a bit heavier dose than called for. FWIW they never came back even though everyone says the FWE will not kill eggs. I had a super heavy infestation of the red worms and just kept adding until ever last one I could see died, including overflows which seemed to take the longest to effect for some reason.
By product of FWE is that it also kills zoa eating nudi's as well!
Hop that helps.
If I were to tell you to not worry about them I would feel bad within me.If they are not bad, should I bother getting rid of them?
I run a sump that uses filter socksIf I were to tell you to not worry about them I would feel bad within me.
I have been studying flatworm for many years. I absolutely love flatworm but for my own research.
Where you see 1 you may have hundreds depending on the system. These guys are masters at hiding.
Do you run a sump with filter sock?
What kind of flow do you have?
What is your total volume?
Lol no need to be sorry I didn't mean to sound snarky or anything just wanted to add that the approach I took isn't for everyone but it worked for me.Im sorry that was nothing against your treatment. Was just giving shep the information that there is a way to rid of these without killing them and releasing the toxins.
Nothing against what you said![]()

How many gallons is your Dosage covering?If you want to rid of them add 6ml of peroxide with lights off. They will start to get really upset and then they will (for most species) end up in the water column. Some species require the use of a power head to get them off the surface they are on.
You will want the most flow you can get and will end up in the filter sock.
This is where you catch them still alive, no toxins released.
You can do this every 24 hours as they may also be in the sump (depends on the time of introduction) and to further remove any that are left.
Totally safe for your tank
Peroxide in a higher dose kills them within 10 minutes so this is what I avoid.
I have an algae turf scrubber and I don't have a skunk cleaner but o do have two fire shrimpHow many gallons is your Dosage covering?
Also, careful about peroxide dosing if you have skunk cleaner shrimp as it will kill them, and careful if you use macro algae in your refugium also for the same reason.

