This does bring up a question. I have not checked yet for other threads about this and there probably are some.
How "perfectly" level does a tank need to be to avoid risk of seam splitting from torqueing the silicone? Does 1/4" matter over a 6' span? What level of "level" is acceptable?
I know it is probably difficult to answer this for sure and "perfectly" level is obviously the best case, but I wonder how many tanks have issues assuming that many people from the "general public" that buy tanks do not know enough about leveling or pay enough attention to leveling the stand. Maybe what helps avoid failure in these cases is that most of the tanks purchased by the "general public" are the mass-produced rimmed tanks that are less likely to have an issue from slight error in leveling?
...also I second the recent comments about verifying the level itself is true, using as long a level as possible, and checking level on the overflow specifically separate from checking tank level.
A 9" level could certainly be prone to error for a much longer tank.
How "perfectly" level does a tank need to be to avoid risk of seam splitting from torqueing the silicone? Does 1/4" matter over a 6' span? What level of "level" is acceptable?
I know it is probably difficult to answer this for sure and "perfectly" level is obviously the best case, but I wonder how many tanks have issues assuming that many people from the "general public" that buy tanks do not know enough about leveling or pay enough attention to leveling the stand. Maybe what helps avoid failure in these cases is that most of the tanks purchased by the "general public" are the mass-produced rimmed tanks that are less likely to have an issue from slight error in leveling?
...also I second the recent comments about verifying the level itself is true, using as long a level as possible, and checking level on the overflow specifically separate from checking tank level.
A 9" level could certainly be prone to error for a much longer tank.
What size of tank and what size of HOB refugium did you have in your case? I find that quite surprising that would be the case unless the refugium was extremely large or the tank quite small. (To be clear: I'm not at all saying I don't believe you, just wondering where the limits are in size relation)Use a long level on every side of the tank. Do you have any HOB equipment?
I added an HOB fuge to my old tank which pulled it so far out of level it started leaking and I had to tear everything down and buy a new aquarium.
I've never tried to shim something as heavy as a full aquarium, but if you find that it truly is out of level, find the cause. If it's too much weight on one side, redistribute. If it's the tank or stand, drain that sucker, and shim to perfection.

