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Noticed it today, already had filled the reefer. Ans yes its the seam between the front and bottom panel.I would contact them and show them the pictures, if it were me I would be a little hesitant to put water in there.... is that the bottom glass to front pane connection?
Bought it new, already had a small issue with the silicone. However after contacting Red Sea they told me it is fine as long the silicone between the glass is perfect, and i believe them. Today i found out about the silicone on the bottom of the tank.I have a 425 and I wouldn’t dare try and keep that. Did you buy it new or used?
I find it hard that they didn’t catch it when they filled it. They check these tanks over very well. Good luck with this!
Only on the 750.....I've heard that RS stands tend to sag in the middle when under load and that it can cause this to happen. I would not accept this in a brand new tank.
There is no sag, something just went wrong with the silicone job.I've heard that RS stands tend to sag in the middle when under load and that it can cause this to happen. I would not accept this in a brand new tank.

They’re going to slap the $@&/ out of you.The response from Red Sea was astonishing, after providing them with the pictures and even some new ones they responded:
I don't see anything to worry about on your pictures. If you have one on which something is visible, please just send it. I'm still waiting for assistance from a colleague, thank you for your patience(this is about the Reefleds).
Best Regards,
My anwser:
As can be seen on the picture below, the silicone has separated between between the bottom and front glasses. You pointed out ’’As long as the seal is perfect between both glasses, there's no point to worry about’’.
On the picture you can clearly see that the seal between the two glasses iis not perfect, it is just bad there is a hole in it, I have marked the hole on the picture.
It looks like they tried to re apply the silicone sealant however this didn’t work and the seal has come off.
After posting the same pictures as i have shown you on a forum i have been advised to drain my tank, because this seal will fail.
After showing my pictures at the store where i bought my reefer they also advised me to contact Red Sea.
As this is a manufacturer’s defect in material and workmanship i am kindly requesting a replacement of the product.
Lets be honest, after spending € 1.599,00 on a reef tank i should be able to expect quality. I bought a Red Sea reefer because i wanted te best quality i could get. Would you really tell me this is the quality Red Sea aims for?
Beacause we both know this seal is likely to fail.
Best Regards,
I am really hoping the silicone will hold until this is sorted out.

