Super nice canopy!
Regarding your water problem i can definitely recommend the airdomes, these are awesome and pump air right into the root zone. They make a big difference.
In absence of them, I regularly shut off the res. This allows the medium to dry enough which invites air into the medium, and allows for more vigorous growth.
Alternatively I find in veg, I can turn off the Res for a good few days, again this encourages air in the rootzone and a more noticeable growth rate.
Just keep an eye and keep test the dryness of the soil. And the weight of the pots. You don't want it to dry out completely as the organic nutrients need some moisture.
When I top feed, I turn off the Res for 24 / 48 give the feed then I leave the Res off for a other 24/ 48 hours.
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