How do I figure pump size for system

abcgt

Active Member
Thanks for everyone that has help this newbie out. I have my clone machine working great (got clones from nephew). & they started to root. Now I am ready for my next project and that is a modified Stinkbud system. I found 5"x5" white fence post (having a hard time getting the right PVC pipe) and will be using 4 of those @ 5' long each. I have heard of pump failures in this type of system so I was thinking I could modified the original system to where I run two 1/2" PVC pipe inside the fence post. The first pump would go in all 4 post down low and the second would be set up high inside. It's a lot of pipe work but I don't mind doing it to prevent dying of plants if a pump does go out. I just don't know how to figure out what size pump I should use. Can someone guide me? Or any other ideas someone may have would be great.
I did think about two pumps and each pump supplying 2 post a piece, but if one pump goes out so does the plant.

What do you think?
 
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