how many cans of spray foam will i need?

[mrpet]

thanks everyone i ordered the foam a few days ago 20 cans hope that covers it. sara the tank is plexi so should stick no problem. what do u guys think about glueing plexi in the shape of shelfs on the back or sides then covering it with the foam? also i too do not want the dog poop look so was thinking of a puddy knife to give the foam shape will i have time to do this or will the foam set to fast?

 

[ReefDoctorMicromussas]

You can cut up the Heavy Duty trash bags... once the foam is in place you can press the sheet of plastic from the bag against it and it will mold that way... also for about 3 minutes or so it will be like foamy clay so you can build just about anything just remember to add sand to get the texured rock look the plexigass sheleves will only bee needed if you want ledges bigger than about 3-4 inches under that they foam itself wil make great ledges wherever you mold them

 

[mrpet]

thanks doc...