how do you get rid of flat worms in a marine tank without emptying every thing?

J

JamesR

Member
i put some crushed coral in my tank so it would look abit brighter but after about a month it was infested with flat worms ,must have come out of the crushed coral,i syphon most of them out when i do a water change but they just keep coming back anyone any ideas on the subject
they are an orange colour with a red dot at one end
 
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