Yeah, my drains on the right. I have a bare bottom tank so all the crud gets slowly blown to that end and sucked up. I have some rocks and wood on the bottom and just recently i've started introducing a lot of potted plants too, I thought it was about time I had some greenery in the tank. Problem now is that the bottom is becoming a bit cluttered and it's not as easy for waste to scoot along the bottom to get sucked up. I'm having to vacuum in the odd nook and cranny where dead spots are starting to form. To alleviate this problem I might just get a more powerful powerhead.Yes ive noticed mine dipping and dodging in the stream of my powerhead as well.
Is your drain on the right side of your tank then? My current decision is to either drill and sump the tank with overflow on the right side panel and returns on left side panel. Or leaving it undrilled, using air powered sponges on the right and powerheads on the left