The red flatworms can be rather nasty - mine litterally covered the substrate, and all exposed rock - you can find pics in the "2.75 - the final countdown" thread in the pictures gallery... Those pictures were after 2 weeks of daily manual removal (using turkey baster + paper towel as a strainer) just couldn't seem to reduce the population any. I'd tried the 6 line wrasse (yep I'm cruel - it was borrowed, got returned a week later when it was obvious it was having no effect) Tried the blue lined nudibranches - they made a significant effect, but died off within a couple weeks for unknown reasons. Mandarins - have a very low probability of eating them, a few will, most wont.
My blue lined pipe made pretty good inroads at removing them, but the pair even with the 2 nudi's just couldn't make a significant dent in their populations. Once the nudi's passed on, and the second pipe passed (never figured out why she died), the tank was literally overrun again.
They're only toxic once deceased, I knew going into this, that due to the quantities, I wouldn't be able to keep the water clean during the treatment, so I planned to be upgrading tank sizes during the treatment, dosed the 2.75 - removed everything 1 pc at a time to a bucket with a 100gph pump - gave everything a thorough cleaning - then into their new 5g home (well indirectly, had 2 brand new, and 1 older 5g spring leaks during this "upgrade" - they went into the old 2.5 until I got that nightmare sorted out - Mitch is going to get a piece of my mind on monday).
Andy
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