As far as the flatworms go. About 8 years ago I had a huge outbreak of flatworms. Then I learned a trick from an old friend of mine. before the sun comes up and the house is totally dark take a flashlight and hold it up to the glass next to the top of the tank. Hold it there for about 5 min. You will notice most of them coming up and then you just vacuum them up. After that I bought a 6 line wrasse and ever since then I have always had one in a reef tank.
You will never get rid of all of them with just the flashlight method but it will get a lot of them out of there.
As far as the flatworms go. About 8 years ago I had a huge outbreak of flatworms. Then I learned a trick from an old friend of mine. before the sun comes up and the house is totally dark take a flashlight and hold it up to the glass next to the top of the tank. Hold it there for about 5 min. You will notice most of them coming up and then you just vacuum them up. After that I bought a 6 line wrasse and ever since then I have always had one in a reef tank.
You will never get rid of all of them with just the flashlight method but it will get a lot of them out of there.