This adjustable water level marker is designed to help make your reef-keeping or fish tank maintenance just a little bit easier.

I personally use three marker points:
Normal water level
Water level with return pumps off
Water level after 10 gallons removed

Doing it like this it makes it much easier for me to quickly visually see exactly how much water i need to remove, and how much i need to add back in so my water changes are more consistent.

You can print as many markers as you want and simply pop them in to the main downrod to mark whatever levels you prefer.

The top key can slot into any of the positions in the top of the downrod to help fit to your specific tank.

This was designed to make it as adjustable as possible to fit the widest variety of tank sizes and uses.

(Note, this is a work in progress design so be sure to leave feedback and thoughts.  I originally designed it as one solid piece for my own reef tank however I am working on making it adjustable to be something anyone can use!)

Adjustable Water Level Marker

Water Level Marker_Downrod .stl

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Adjustable Water Level Marker