E-Marco 400 aquascaping mortar
 

I'm an avid diyer and I had some strong reservations about buying this product at first. But I will now vouch for marco 400 mortar as an incredible product if you are looking to aquascape intricate designs. It cures in 2 hrs which allows 3 to 4 applications throughout the day. Work in small batches. This design i made about 15 to 20 small batches and I still have 1/8 bag left. Well worth the price.
I'll post some pics in the picture section of what I was able to make with this product.