Outdoor Season Update

This summers growing has been progressing steadily. Ive harvested the basil a few times, and the cucumbers and squash now have fruit beginning. The cukes and squash have had flowers for at least three weeks, but until recently all the flowers were male - that means no fruit. I thought the lettuce might grow well under the shade of other plants, but so far theyve just stayed small and dormant. Bell peppers have produced a few fruits but few new flowers. Nitrate levels in the water have remained very high (~80ppm) and Ive put some Maxicrop plus Iron in as well. I started up the tank with pure ammonia, so I think there was a lack of some trace nutrients, including iron..