Yvan- I'm new to the list but have an idea. if you are worried about fry getting thru than you can try silk that they sell at craft stores. I use it for peat filtration in my filter. It's actually the same stuff they use when doing pulmonary (and I guess other large vessel type) surgeries. It is used to prevent bubbles from forming in blood. luckily it works great for tanks too. you would still need to have some type of frame, but it could be attached to 2 poles which would fit into slots on a frame...that way if it started to stretch, you could wrap it around the pole and it would be tight again. but for the same amount of $ you could just get another tank like someone mentioned before. just trying to help, Archie look for my description soon... I'm just here to learn...when it comes to learning, I'm an expert. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto