Algae Control ideas with Harlequin Tusk in Tank

[Herndo]

I have a harlequin tusk and he eats all my crabs and most of my snails. I try to keep him full but he thinks it's a hobby of his.

I have a tuxedo urchin that has lived almost a year and he doesn't get bothered by the tusk, but he's only one man. Can I have more than one of them? He does an ok job. is there anything esle I can put in there to clean the algae,?(hair algae)

I've lowered the timer on the lights to slow the growth and my phosphates came from having to use tap water twice to top off as I was out of Distilled. I guess the phosphates will run out eventually, but I was hoping there were some other cleaners out there. Thanks.

[Lorna]

My suggestion would be to run a sump with macro algae in it to out compete the algae in the main display. This will also assist in nutrient export........either that or more dilligent water changes and run rowaphos or some other phosban to reduce the phosphates