My buggest question is...SHould I rent a cement mixer...Should have 500 pieces of pvc from 3-5 foot...10 per cement base...50 structures...25 bags of cement...Hand mixing 25 bags doesn't sound that bad but then I think about how I feel after mixing 2 and I know of the 25 I'm gonn ahve to do half...SO we might rent...I'll post picks of our new REEF...