Yes, they are. I'm new to aquaponics so I'm curious on the safe way to treat these and not harm the fish. I know ladybugs will eat them, but I've always had mixed results attracting them or buying them and setting them free.
The big one in the first image (062.jpg) looks to be an aphid, but it's hard to tell for sure. There are darker colored varieties (Aphis fabae & Nasonovia robos-nigri for example), but most are used to seeing the yellow-green ones. Aphids feeding on plants getting high levels of nitrogen (aquaponics!) can appear darker as well.
It's been hit/miss when using lacewings for me, but ladybugs usually work well. Molly (Stanek) found that spraying ladybugs with a sugar-water solution (try flat Sprite or 7-UP) at the time of release will temporarily 'sugar-glue' the wings shut and keep them around longer. From personal experience, I don't feel secure until I've seen a few ladybug larva show up. Within a week of them making an appearance, I've always noticed a drastic reduction in the target pest population, as compared to just the adult ladybugs alone.