Most tanks have a frame yes. It's not that big. My big tanks frame is only about an inch wide.jpm995 said:Don't most tanks have a decorative ring around the top edge so you don't see the water line? Mine has room for a 1/4 inch leveling error.
Okay, I see what you're saying, if that curved lip were submerged, water would flow out from it as opposed to it falling straight down (because gravity sucks) when the water level is lower. No arguement there. I amend my drawing:Dave125g said:Penguin biowheal? I got 1 on my 40. It has the lip on the bottom to direct the water across the top. Yours does too
Yep there it is.Momgoose56 said:
My tank is 2mm low on the left and if I can see the waterline I think about reshimming the stand. So of course I fill so I can't see it.mattgirl said:Me too !!!! my 55 is about 1/4 inch lower on the right side so I have to live with a tiny water line. I have learned to live with it but wish it weren't so But I always keep my tanks filled high enough to keep the HOB's output below the water line.
I have never been able to get my tanks perfectly level, so I simply try to get them to lean slightly toward the wall behind it. That way if it tips(for some odd reason) the wall stops it. Hopefully.Kevin1962 said:The stand is as close to perfect as 2 days of shimming could get it. Levels on the bottom glass say it's level.
Marineland trim? Not so much.
Fish pellets!! I haven't found anything that works (but I've been trying different beans-3 different lentils, anasazi, dried chick peas, even freeze dried rice... etc.) But all are either too buoyant or too dense. Slow sinking pellets would work! I have to get some...John58ford said:There is some merit to both lines of thought to be honest. However, no when water falls from a distance closer than terminal velocity, it does not lawn dart straight back down to the intake tube. (Ever throw a water balloon at a pool and see it splat right open in all directions, not sink?) On the other hand, the closer to the water line your outlet is, up until it touches, the pump had less static head to overcome and the gallons per hour will sightly increase.
Things change once you submerse an outlet however, then there is a presence of a slight back pressure (due to gravity of the tanks water, resistance and convergence), and surface tension will no longer be in your favor, there will be a decrease in gph upon submerging any filter types outlet. There's also the chance of tank stock or snails finding their way in allot easier.
As allot of people say, there is merit to testing various levels and setting your tank up the best way you can to meet it's specific needs. The idea to use semi Buoyant items, such as fish pellets to see your flow is a good idea and most people should give it a try.
Thanks for opening this post, if for nothing more than to encourage some thought.
I do have a 10 gallon 'dry docked' QT tank. Lol! I'll have to get liquid food coloring and an assistant (granddaughter) for a liquid test. Plus the you tube stuff. My minor was Informatics but I have no idea how to upload videos onto you tube!Dave125g said:Best way to test it is in an empty tank with food coloring put right into the HOB. You'll be able to clearly see where the water goes out of the filter output.