am i being a Sissy

[Basile]

Ok i have this rock work that weighs about 60lb, now i know are tanks holds thousands of pounds of water, i have a 150G . And i'll add sand and about 180 lb of rocks. But the sculpture i made has a "V" shape as you can see in the picture. I've built a support structure that is now failling and craking all over. That in mind i'm getting worried that the weight is too great on that one spot. If i cut the stands legs and put the structure directly on the sand, do you think its going to be ok, or just get rid of the whole feet all together and put the 16"X7" base rock directly on the glass be a better choice. 60Lb on an area 16"X7" is that too much for any glass. Any thoughs. Some of you must have done structure i'm waiting for your inputs thanks in advance. Maybe i'm over thinking this, just let me know.