True, but it does not need to be too complex. All you are trying to do is direct the HOB to intake from the top 1/2" of the water instead of 6" under. This can be accomplished by a weir or by pulling directly from the surface. Take a look at a picture of the Octopus HOB classic 100. It directs the intake back up to the surface with an adjustable intake. Perhaps you could mod what you have.
Beyond that... my already limited thoughts are exhausted.
Thanks,
Matt
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Current Tank Info: 54 Corner
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