Aquaponics: 500 liter system

Here we discuss upgrades and aplications in the current 500 liter AP-system.

Is everything working well with the system? How is the pump i traded you for the mat?
What are you growing there?
Have you had any problems with fungus gnats (banan/fruktflugor)? I had, and I think it was their larva all over my lefy green herbs so they pretty much died. The infestation died out after they had no more plants the could live of so now its getting better. And also we are getting more sunlight. I have 500 watts of metal halide on for a few hours every day but Im not that impressed by those energyconsuming, scolding hot, big and expensive lights. It might be that the bulbs are very old tho but ya know, Im not buyng new ones for 600 kr each. Im gonna get led och fluoresent until next winter.
Are you using any artificial light?
Chili is by far liking the enviroment the most! I had ony one fruit for a long while but when it was ready, four more where growing and there are at least ten flowers right now.

Here's a link to an article Im currently scanning for info. This caught my eye tho: "I recommend finding the highest quality fish feed you can afford that has been formulated specifically for the kind of fish you are growing. Not only will this go a long way to insuring the health of your fish, but since the plants are being fed from the waste of the fish, it will go an equally long way to insuring that your plants have everything they need." och "You should not need to supplement, or supplement only rarely".
http://theaquaponicsource.com/plant-nutrient-management-in-an-aquaponics-system/