A little UPDATE.
I was away for a while. The beauty of my aquaponics system is I can walk away for a few weeks and still it us running. Today I planted new plants in the system and I plan to grow my own waterpest. I have a spare aquarium so that would be a good way to experiment with that. Also I'm planning to get a second traysystem but not decided yet first I'm gonna expand my system with plastic bottles. I'm planning to grow lettuce in it.
Plastic bottles you say? Yes. Here is an example of that.