runnin pellets with no skimmer question

[acepumping]

hey, i am just starting to run pellets . i disconnected my uv sterilizer and started to see a few dots on my hippo, i dont think its ich. they have come along time ago and as soon as i disconnected uv, it came back.. i was wondering though how long can i turn off my skimmer if i am gona try herbtana, to see if it fixes that problem with the hippo??