Tight Lid?

sappho

New member
I want to get a wrasse but given that they are known for jumping out of tanks. What exactly is meant by a tight lid? My 55g has a glass lid but there are a couple small (aprox 1/2 inch) gaps where cords come out of the tank. Is this sufficient? If not how can I modify it? The waterline in the tank is 4-5 inches below the top, will the fish even be able to jump that far?
 
Usually people use screen or eggcrate to make a top for the tank. Glass tops are bad because they kill your gas exchange. But that said, your wrasse probably won't be able to go through where the cords come in.
 
Go to a sewing or hobby store and get some plastic needlepoint canvas. Cut it with scissors to make a plug to fit the hole and you should be escape-proof.
 
Get this!
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Eggcrate just gives them something to aim at IME. A diy screen top using window screen frame and 1/4" mesh is your least expensive and easy solution
 
Mesh tops cut out sooo much light.


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I'm sorry, but that is just nonsense. Clear mesh blocks almost no light at all. Eggcrate, on the other hand, is actually sold as light diffuser and will significantly affect the amount of light getting to your tank.
 
This is true. Mesh is the way to go.
Unless light is not a concern. I made an egg crate lid with mesh attached to it for my QT tank.

In terms of gaps, I just lost a blue filament wrasse a week ago. My top is tight as hell. The largest gap is a sliver in the back about a quarter inch wide and inch long. It is the ONLY place he maybe could have jumped. Still baffles me tbh...

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I'm sorry, but that is just nonsense. Clear mesh blocks almost no light at all. Eggcrate, on the other hand, is actually sold as light diffuser and will significantly affect the amount of light getting to your tank.



lol you're mistaken, I've used both mesh top and egg crate, the egg crate looks so much better than mesh. The tiny squares block out more of the color spectrum just because your eyes can't see it doesn't mean it's it happening. Get a par meter [emoji1419]. The only "mesh" top that are good to use are the 1/4" squares.


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Ya, that's the mesh I'm referring to as well. It is very translucent.

I have a hard time believing that light diffuser (egg crate) does not diffuse light. I would think that a t5 setup where the light is as long as the tank and you have very vertical light, the effect would be less. But a LED or halide light, especially a kessil or radion, has a ton of directional light. The crate would effectively block some of it.

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I tested both on a 24" x 24" x 20" semi-cube tank simply because I had the use of a PAR meter and a little free time on my hands. It was difficult to average out the readings because the egg crate would be slightly higher in some areas, lower in others but overall the egg crate blocked more light, especially on the outside edges where at least to me I wanted more light. I was using a single LED light source, so results will vary with multiple lights or T-5 lighting. You will find just a little more PAR directly under the lights with egg crate (about 3%, but the measurements are difficult to get exact numbers on), somewhere close to 10% less on the extreme outside edges.
 
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