Welcome back! If you're into DIY, a 75 tank converted high would be both perfect and awesome, especially for tree frogs. The base of the tank really only needs to be at least 18x18, and a 75 works for that, and it has a 48" vertical! I'm no expert, but for the leaks, I would just say using a razor to cut away all silicone on the edges and re-silicone it with aquarium grade silicone that you can buy at an aquarium store or online. Much cheaper than buying another tank, right? If you search the threads, you should be able to find some people who have documented how they converted their tank. Usually you can just do a 6" piece of plexiglass or acrylic on the bottom in the front for substrate and drainage layer, and then a custom screen door for the rest of the front, as tree frogs like ventilation. You can either do fake plants and vines, or a natural vivarium, just on what you prefer. For heating, red heaters are a no-no, as people have experienced frogs being able to see the red light and hiding at night as a result. Ceramics are fine, as well as side mounted UTHs. For grey tree frogs, though, you shouldn't need to heat that much, as they only need about 75 degrees at day and 70-72 at night. For supplements, calcium powder and a multi-vitamin powder are a must for all frogs. These can be found at pet stores usually, or can be ordered at joshsfrogs.com or neherpetoculture.com, and other websites. I know Repashy brand is preferred, but rep-cal is acceptable. UVB is more of a luxury in my and many other's opinions, and can add to coloring, but isn't required. I believe that compact UVBs also can damage the eye, and only long fluorescent and mercury vapor bulbs are acceptable. For the frogs, you can buy some from BackwaterReptiles.com for about $10 apiece. If I were you, I would sell the chipped tank on craigslist, people will still use it for reptiles. As for a vertical tank, mine isn't the best, but should give you a shrewd idea of what a vert-converted tank and door look like:



Here's a blurry shot of the conversion kit placed on (got it at blackjungle.net)


Sorry for typing so much, but hopes it helps. Once again, welcome back!