ive just started seeing nitrates now, after over 2 months, i was getting worried for a while,
anyway, i was doing a water change and desided to look to see if i could find where the bacteria are hanging out, my filter is a juwel built in one, with baskets for loads of sponges, well i took out my sponges and they all seem clean, the only thing in the tank that has any "gunk" on it is my power head is that were my bacteria have colonised?
i put my hand inside the filter to feel the walls but they dont feel slimy.
the reason i ask is i dont know if i should clean my power head, i dont want to risk getting rid of my only bacteria. the gunk is a cream colour about 3mm deep (its a slightly green colour now since i treated for ick last week)
im afraid it will eventualy block up the pump head
i know that theres bacteria in the gravel too, but is there enough to keep the proces going if i clean the pump?