It used to suck out at a good rate, but in the last two water changes it has been at about half the amount of fluid coming out.
The only changes I have made is to raise the water level in the tank by an inch or two, though I doubt that is the problem. It seems like maybe the water isnt flowing through as easily, but when I tried washing it out there didnt seem to be a problem as the water flowed through fine.
I have tried to pull it apart, but it doesnt seem to want to separate so I cant clear the filter bit before the tubing, do I just need to pull harder?
I know it is a wierd question and I hope I havent put it in the wrong section.
Thanks for helping in advance