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For the hard to remove algae on aquarium glass (not for use on acrylic).

Step 1: What You Will Need

1. 3/8 in wood dowel (cut to appropriate length for your aquarium).

2. Single-edge razor blade.

3. Small machine screw.

4. Super glue.

Step 2: Saw 45 Degree Notch

Make notch only wide enough for the razor blade holder edge to fit snugly.

Step 3: Saw or Sand End Parallel to Notch

Step 4: Drill Pilot Hole for Machine Screw

Drill through to slot.

Step 5: Insert Blade and Tighten With Screw

Tape cutting edge while inserting and tightening.

Step 6: Add Super Glue to Underside of Blade Dowel Interface

Step 7: Watch Algae Disappear

Rinse and dry after use, especially if used in a saltwater aquarium.

You can prolong blade life by spraying with lacquer.

Blade can be easily replaced and re-glued.

Remember, DO NOT USE ON ACRYLIC.

Step 8:

<p> I'm thinking to do this with a siphon which removes the algae from the glass and then tank. If rod were hollow and attached to a hose. So you could clean algae off and do water change at same time. </p>
<p>I'm sure this works great! I only worry about possible harm to aquareum life if they happen to swim by. Have you noticed that they cower off in the corners when this is around or no?</p>
No more than sticking your hand in the aquarium. Fish are to agile to get in the way of a scraper.<br>

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