Spray foam for 3D background

[jpierce3]

I was wondering what product was best used for 3D backgrounds? I saw the Great Stuff at Home Depot, but didn't know if it was fish safe and if there is a cure time recommended before putting it a tank with fish?

Thanks if anyone can help out.

 

[dbosman]

Cure time is a day or so but it depends on thickness and the ventilation in the area you spray it in.
Landscaping places that cater to pond folks sell black expanding foam. Such as this:
http://www.amazon.com/Beckett-Corp-...ies/dp/B000A0LFJ0/ref=acc_glance_hi_ai_ps_t_1

Um, you are aware you have to really, really, glue foam to the tank?

 

[jpierce3]

Um, you are aware you have to really, really, glue foam to the tank?

water fall foam my work. A bit more expensive though. I'm not going to do a background or attach it to the tank. I need to float this tray in my sump:


Putting together an aquaponics type grow tray in the sump for lettuce (two little Radican swords in there now as my test plant). It kind of floats now, but one little touch and the hydroton goes everywhere. I'm afraid the weight of the lettuce would push it down also as it grows.

I could just cut pieces off a block of styrofoam and silicone them on, but I thought the spray stuff might be easier. I just haven't used any before and didn't know what others had success with.