Open loop as opposed to a closed or dead end circuit. I have modified your image to illustrate. This enables the pressure to be equal everywhere up to your ball valves which makes for easy fine tuning of water flow. This is especially important in your case because your tanks are at different heights (water head differences). Also you can get threaded ball valves too if you want to remove them at a later stage.
There are quite a few advantages to central filtration such as using shared heat source, shared auto water change, shared auto fish feeders, total overall water volume being larger and more stable etc. Do use a quarantine tank if you are always adding new fish.
There are quite a few advantages to central filtration such as using shared heat source, shared auto water change, shared auto fish feeders, total overall water volume being larger and more stable etc. Do use a quarantine tank if you are always adding new fish.
My new house isnt built yet, so it will be a while. But when the day comes, i will be ready 
For now i guess i just have to plan it all out - which is what i am doing 
A couple of things that may also help... use a submersible pond pump rated at the capacity you need. Quiet and cheap to run. Due to the lower pressure compared with a swimming pool pump you should then do the open loop with 2 inch piping for maximal efficiency. Start the open loop with a 45 degree Y piece as a T piece at this point will take away a lot of flow. I´d also stick with ball valves. To increase the effectiveness of flushing the ball valves just turn a couple of the others ball valves off to raise the flowing pressure from the pump (a couple of seconds should be enough). Don´t get distracted or walk away from the tanks while you´re doing this unless the overflow can cope with the added water coming from the open ball valve. 