I think you can get unlucky with a tank with or without a wavebox. Honestly I think if a wb pushes things over the edge then there was a latent flaw to begin with. A 10% reduction in lifespan is a WAG at best. So 1 year out of 10 ... But who has a tank longer than 5 years anyhow n very few.
I was worried at first with my tank because I heard stories of plants leaves wiggling when left on the tank, but on my tank with 2 there was absolutely no movement to the glass from the wave.
What you do need to watch out for is the overflow height from the top of the tanks. A tank with wb should have a lower overflow.
My $0.02 anyhow.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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