Markings on Glass

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Gazcp

Aquarium Advice Newbie
Joined
Apr 10, 2014
Messages
2
Hello

I have an Aqua Marine 900 fish tank, with 40 fish in.

In the last few weeks we have noticed some strange markings appearing on the glass.

We have tried to clean these off the glass, but with no hope, I plan to try and scrape them off when I next clean the tank.

I have attached the image I managed to take while the tank was empty.

I check my water the day after cleaning the tank, and all parameters are in safe regions, saying that I have never had any issues with the water.

I was hoping someone might be able to suggest a solution of sole the issue.

My lights are on as follows:
Blue Lights - 11:30am too 1:10pm then 7:40pm to 10:00pm
White Lights - 1:00pm to 7:30pm

The fish get fed once a day at 10pm.

Thank you in advance
FishTank.jpg

Gary
 
Hi, I can't really tell - are they down the bottom? Silly question but not the aquarium sealant or carbonate build up?
 
No these markings are only one right hand side front panel of the fish tank, the left hand side has none of these markings.

We are just in the process of replacing the right hand side blue lights which we believe are UV lights, so we will see if that makes a difference

Yesterday I again checked all water parameters and all came back with safe readings which have been constant since having the tank 2 years ago.

Thanks
 
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