<a href=showthread.php?s=&postid=10683222#post10683222 target=_blank>Originally posted</a> by wrott
yeah, those look like flatworms. You should be able to siphon out quite a few--then use flatworm exit ??? I never have used it, so I don't want to steer you wrong.
<a href=showthread.php?s=&postid=10684665#post10684665 target=_blank>Originally posted</a> by spanglish
What if I don't treat??
<a href=showthread.php?s=&postid=10686055#post10686055 target=_blank>Originally posted</a> by lvpd186
If you use a smaller airline type hose the suction it creates should get them off the rocks. Basically its going to take some time for you to catch up with them, but by syphoning them off this way, and with water changes, you should make some headway. Also you might want to ID them first anyway, they might be a harmless type.
<a href=showthread.php?s=&postid=10686173#post10686173 target=_blank>Originally posted</a> by michaeldaly
I had an infestation of those about a year ago but for some reason I used a liquid phosphate remover in my tank and it got rid of all the flatwormd.