I read a tip somewhere regarding how to determine the dosage of flatworm exit. Use a bucket and fill it with 1 gallon of tank water. Siphon out some live flatworms and put them in the bucket. Then dose flatworm exit drop by drop and count how many drops does it take to kill the worms. Stir the water between drops. Multiply the drops by your tank volume and you get the dosage. The reason you need this procedure is that some people say they need a lot more than the recommended dosage to kill their worms.
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