I've also been experiencing some intake problems. I just brought my first Betta home last night (see
here for the whole sordid tale of my current tank) and he seemed to be doing fine.
When I checked on him this morning, he was motionless (except for his gills) and seemed to be pinned against the filter intake. Fortunately, the intake is covered with a grate and none of his fins were being drawn into it; when I opened the tank and gently tapped the water near him, he immediately snapped himself away from the intake and swam to another corner of the tank. I continued to observe him for another few minutes, and watched as he slowly drifted back toward the intake and his previous position.
The intake does not seem to be doing him any harm and (as previously stated) he seems to be able to get away from it, but I'm very concerned about his stress levels and the overall current in the tank. I shut the filtration system down roughly one hour ago and have been observing him carefully since: he seems to be actively exploring his new home now, whereas before he seemed to stay toward the side of the tank where the intake is located.
For those who didn't feel like wading through the thread referenced above, the tank is twelve-gallons with an integral filtration system. I have no way of regulating the intake short of actually blocking it with something (which sort of defeats the purpose). I do not have an issue shutting the system down for a few hours, but that seems like a very poor solution.
Would I be better off purchasing a smaller tank/filtration system for him? Do you think the current is a problem? How long (in twelve-gallons) can I go without the filtration system being active? Any ideas?
Suffice it to say that this is
the last “all-in-one” tank system I'll ever purchase. At this point though, my primary concern is with the Betta's wellbeing...