I mentioned in another thread that I use fabric and "sticky back" velcro to cover the openings in my tank lids so my fish can't jump out. Since I set up a new betta tank today I thought I would take pics of the process in case anyone is interested.
I use lace or mesh so that air can still be exchanged thru the fabric. Also, many lace and mesh fabrics will stick to the "rough" side of velcro on their own, which makes it alot easier. If the fabric won't stick on it's own then you'll need to use the "soft" side of the velcro and attach it to the fabric.
The tank I set up today is a 5g minibow. The first pic shows the opening I want to cover up:
The pic below shows where I applied the "rough" pieces of velcro to the tank and hood/lid:
Below is the piece of lace I cut to fit the area:
And here is the covered opening - this lace fabric sticks to the velcro on it's own:
Here is another small opening on the same tank that I also covered - you can see how the fabric molds itself around the power cord:
Here is the finished tank. You can barely see the fabric, and I think it actually looks better than a gaping hole. The fish can't jump out and air can still move thru the opening thru the lacy fabric. Plus it comes on & off easily when you want to remove the hood/lid for maintenance:
I've also done this on my large tank with a glass lid - the fabric molds right around the pipes, cords and tubing. In this case the velcro is on the back edge and sides of the tank and on the back edge of the glass so the large gap running along the back is covered up:
And last is my Q tank - I had to set this up in a hurry one day and didn't have fabric that would blend in or that would stick on it's own, or black velcro. But since no one ever sees this tank I didn't care how it looked. But here you can see an example of how I had to attach velcro to both the tank and the fabric in order for it to stick:
And then here it is all covered up (ugly, but effective). I'll probably re-do this one with the leftover fabric and velcro from my minibow project today.