I set up an ebb and flow system and got some seedlings started now. Hooray so far!

I know you're supposed to keep nutrient out of direct light. Not just to prevent agea growth, but also for making sure some items in the nutrient do not become unstable/modified by the light.

I am concerned if I set up my system correctly. Each time the tray floods, the nutrient will be inundated with light from the grow light hanging above (my system has net pots setting in a flood tray, so there is open space where the nutrient is directly under the light).

Could anyone please tell me how much of a problem this is?

Also I am considering cutting some black and white poly film and putting holes in it to set the net pots down in - might help solve the problem, if there is a problem here at all. Would also help to reflect light back up to the plants (with the white side of the black/white poly facing up).

Thank you anyone for your advice!