oh sorry about that,u want all of your holes to be on the side of the container near the bottom.i think the bbest reference picture i can think of for u would be....... the water farm 8 pack. look up that system and look at how the plumbing is set up.this is exactley how yours should be,with the exception that your 1/2 makes a complete return and does not just stop at the last bucket like is pictured.that is y u have 2 on off valves at your rez "the last container u would have bought to make this work.the half inch is only used to return the water to the rez.the reason it needs to be a complete loop is because your only running 2 grow containers and if its hooked up in a straight line of buckets u will always be pulling more off of the first one and your levels will never be the same heighth.i hope this helps