The usual assembly plan on a frameless tank has the bottom pane of glass raised up off the ground a few milimeters, this should protect from the small stuff you can't see. More of a gap might be needed as the tank gets bigger, especially with such a water load, glass does bend slightly little before is busts.
Did you check if the glass was thick enough to hold that amount of water? Most of the online calculators seem to be based on Calculating Glass Thickness for Aquariums but this webpage has a different calculation for the base of the tank than the sides that is ignored in all the calculators I've seen. In their sample calculation (for a giant 3'x9' tank) their base had to be nearly 50% thicker than the side panels. They also mention some kind of "self-leveling filler" will help you get away with a thinner base.
Either way, major bummer.
Nothing beats a macro lens and the know how to use it for close ups. I don't think I'd like a 50mm for frog close-ups though, I use a 100mm and would often like to be furthur away. Just my preference though
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. I don't think I'd like a 50mm for frog close-ups though, I use a 100mm and would often like to be furthur away. Just my preference though
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