Glass Cage warranty........

[delta]

I am not talking about building pressure rather inconsistent\changing pressure\force. Although even if it is a small amount it is usually more damaging then a large amount of pressure as you are referring to.

 

[JeremyR]

I"ve never seen oceanic enforce that. If you vouch for the customer's stand, they'll usually come thru.

Companys set warranty based on what they think their replacement cost is going to be. Sometimes you'll see a company come out with a 5 yr warranty, then go to 3 yrs, then 2, then 1. Generally that's because they are getting enough failures that they have to lower the warranty term to stay profitable. When a company has a warranty as short as 90 days, it means they aren't confident in their product.. if they had zero failures in the 1 year or 2 year range, it would make sense for them to have a 1 yr or 2 yr warranty just for propaganda alone.

 

[Gina McReeferson]

"I don't think the argument that is is only a gal is much of an argument if you do not factor in the velocity of that gal of water. It is not equal to dumping a gal of water at one end of your tank." -Delta

Exactly,

If you were to increase the depth of the water with a trickle feed, then the water pressure acting on the tank would only increase equal to the added "head pressure" of the increased depth. I think it is the speed with which this water is injected into the tank that is causing the majority of the hypothetical pressure spike. A powerhead is merely moving water around the tank, a wavebox is rapidly adding an outside volume of water to your tank, then allowing it to rush back out.

-Dave

 

[Jill & Brian]

In the case of the wavebox, you are taking a large amount of water and accellerating it from one side of the tank to another, you then time the wave box to discharge again when the wave comes back. the problem has less to do with pressure and more to do with the force of a large volume of water hitting one side of the tank, then bouncing off and slamming into the other side of the tank. this is where the seam stress occurs.

THe wavemakers move a lot of water, and unlike a powerhead, never let the tank get to a state of equilibrium where the water is all flowing in one direction. It is designed to keep the water slamming back and forth.

If you have a wavebox, a heavy, sturdy stand is probably as important as a nice thick tank.

 

[NateHanson]

In the case of the wavebox, you are taking a large amount of water and accellerating it from one side of the tank to another, you then time the wave box to discharge again when the wave comes back. the problem has less to do with pressure and more to do with the force of a large volume of water hitting one side of the tank, then bouncing off and slamming into the other side of the tank. this is where the seam stress occurs.

THe wavemakers move a lot of water, and unlike a powerhead, never let the tank get to a state of equilibrium where the water is all flowing in one direction. It is designed to keep the water slamming back and forth.

If you have a wavebox, a heavy, sturdy stand is probably as important as a nice thick tank.

If by "large volume" you mean about 5% of the tank volume, then yes, I agree with you. Because that's how much water is moving from one side to the other. The rest of that moving water is exactly offset by water moving in the opposite direction. Just as with a powerhead, 100% of the water moving out of the pump is counteracted by water moving in the opposite direction. With the wavebox it's perhaps 95% of the moving mass is cancelled by the mass going in the other direction.

If we were talking about hundreds of pounds of water moving from one end of the tank to the other every couple seconds, for one thing you'd be able to SEE that amount of water actually switching sides of the tank. You can't because at the same time, water is moving back towards the other side of the tank to replace the moving water. Also, if hundreds of pounds of water were travelling 4 feet and then slamming into the side of the tank and turning around to do the same thing on the other end of teh tank, the whole tank would skid across the floor a couple inches with each cycle. Lean against the outside of your tank with a wavebox on, close your eyes, and tell me if you can feel yourself getting pushed by the tank. If yes, then for gods sake shut it down, because there's no way that tank will last a day under those conditions. But I don't think you'll feel hundreds of pounds running into you with each cycle. I think what the wavebox does, is pulses the water in the tank 3" to the right, and 3" to the left, as it displaces and then absorbs a couple gallons of water from the tank. Look at the fish in the tank. They just sway a bit the left and a bit to the right. If there were 700 pounds of water travelling the full length of the tank with each wave, I think the fish would be flying. It's more of a pulse than a torrent, IMO.

 

[smcnally]

Ummm...Nate...You can feel the tank move with a wavemaker. That's what we've been trying to explain to you guys.

 

[NateHanson]

Hehe.

Well look out!

So Steve, do you think it's a major danger to the tank?

 

[smcnally]

I don't think it is a major danger. It doesn't rock the crap out of it, but you can certainly feel the weight shifting. Mind you, this is only really noticeable with one pushing pretty good sized waves.