Both of them held water over a week. No problems.
- I'll put the ZooMed tank & the 20 Gallon Long Fish tank side by side tomorrow to do some measurements. But I think they're identical.
Last time I checked, I think the ZooMed tank looked like it's made with better materials though.
- The 20 Gallon - critter cage is has those extra built in features & is less than 1 year old. The used one that held a turtle, is probably 2 years old.
- The 20 Gallon Long tank was manufactured in 1998. From it's near new condition, I think it was only used for maybe 1-2 years, then drained & put in someone's basement/garage for 10 years.
The gravel I scooped out of it was ANCIENT, looked like mixed assortment of fruity pebbles. A lot of the paint on the gravel was flaking off it. Also came with 10 year old water test kit that still works.
If you have any other suggestions let me know.