Hard water stain

[bombero11]

Test filling my tank before aquascaping and realized the water level on my reefer 350 is lower than the hard water stain. I can’t add any more water other wis the float valve ato in the sump will be completely under water

Any advice would be awesome
Thanks

 

[pelphrey]

You don't have your return pump running, the height of the water, once it is running and you have flow in the tank you'll be at or above that level.

 

[bombero11]

You don't have your return pump running, the height of the water, once it is running and you have flow in the tank you'll be at or above that level.

I do have it running and it’s still about a 1/2 in under the water mark

 

[pelphrey]

It isn't running in the picture, so I based my response on that. My rimless tank gets dirty like that, I just run my fingers across it. Your water level looks low to me though.

 

[60CubeReefer]

Turn up the flow on your return pump.