How old is the drainage system in mumbai?

Hydroponic (rockwool drip system). How do I collect the drainage easily on a large system for not much $$$?

• I have a hydroponic system using rockwool slabs and a drip irrigation system. I wanted to know if anyone knows of an inexpensive and simple way to collect the drainage and pump it back into the tank. The tank is not under the system so i would need something with a backflow preventer and a pump.

• Answer:

  You need a submersible pump and a hose. That would take care of all your problems. They range in price between $20 and $115 and you can get them at any hydroponics store or online. The price difference is due to the power and the clerk should be able to tell you what you need for your size tank and the height that it's in. Hook it up to an electric timer to drain as needed. Don't forget to aerate your water as well so if you don't have one, buy an Air stone and Air pump as well. Again, you can find them online very cheap. Good luck.