Bottom of Red Sea 350 glass is not flat

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TonyNJ

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Hi, I have been working on my first build in 20 years. I'm really amazed in how the hobby has progressed. I'm really running into a few stress points I could use your feedback on.
I also cross-posted this into the RedSea Sponsor forum, though for some reason I can only see the post when I am logged in, so I'm posting here as well.

I initially purchased my Red Sea 350 at a LFS and due to some defect issues with the tank and sump, Red Sea sent me a new tank and new sump. Very happy to see them on top of customer service!

Once tank was put on leveled base, I had noticed that the tank was not touching the base on both front corners. The tank really sat with its weight on a patch about the size of a flattened basketball in the center rearward part of the tank. After some calls to Red Sea, I was reassured that it was normal and the tank would flatten out once water was in it.

Starting about a week and a half ago I began doing a full wet running test with RODI water.
other than a leaky fitting, looks good and those spots on the front two corners closed up. Today, I decided to take a thorough look at the tank to look for any settling with level and so forth, looks good except for two issues.

The right rear corner has a gap between the glass and the base foam going in about 6 inches. I'd say the space varies from about 1/16" at the edge down to 1/64" in further.

Also, looking at the center front lower edge of the tank, I noticed that if I put a straightedge on the lower edge of the front glass pane, things are straight, however if I move the straightedge on the other side of the silicone on the bottom glass pane, the glass itself is not flat, it has a bow in it and the straight edge rocks.(see video below) I'm guessing that it was a defect when it was built, not sure what to do.

The largest tank I had in the past was only 30 gallons, so I'm a bit more concerned with issues like this on a tank this size, as if the seal fails, my family room will be destroyed.
Should I be emergency draining this tank? and what are your thoughts of this or is your tank the same.

I've added links to the photos referenced above as well as a video of the lower pane issue.
photos:

https://drive.google.com/open?id=0B2...2JFODdfSWh5dVk

https://drive.google.com/open?id=0B2...DhsQkVadlVlNEk

video: (if it doesn't stream play, you might need to download and play locally)
https://drive.google.com/open?id=0B2...UVzaXd5bEZBVGM


Thanks for the help.
-Tony
 

ibob991

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links are dead

Ps:
picking up a 350 reefer from the LFS on tuesday so I will be keeping an eye here about your story, hopefully everything is ok!
 

Lowell Lemon

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I am wondering if this a caused by dimensional instability in the glass panels themselves. In acrylic cell cast sheets the center of the cast sheet can be 1/16" thinner or more than the outside edges due to the casting process. It never caused a problem with acrylic tanks and I have fabricated thousands over 30 years. Glass is I think a liquid if I remember correctly. That is why you see old glass windows with a slumping appearance to the panes. I have been told that if you measure the old glass panes the top of the pane is thinner than the bottom. Never done that.
However if Red Sea warrants the tank and you have set up according to their standards on their stand you should be okay. Get ready to enjoy a great tank as evidenced by the many excellent results on this forum.
 
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TonyNJ

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I'm really not sure what could cause this, my guess is that when they build the tank, they have some type of jig to work with and maybe it is only supported on the edges? If the tank wasn't sitting on foam, it would definitely not be sitting flat.
I hope to hear back from Red Sea on Monday, and see what they say.

Sorry about the dead links, let me know if these work:
https://drive.google.com/file/d/0B2utJp7mrkNWY2JFODdfSWh5dVk/view?usp=sharing

https://drive.google.com/file/d/0B2utJp7mrkNWMDhsQkVadlVlNEk/view?usp=sharing

https://drive.google.com/file/d/0B2utJp7mrkNWTUVzaXd5bEZBVGM/view?usp=sharing
 

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