Lettuce in Raft Dieing

[R.K. Castillo]

I recently started doing DWC Rafts.  I had a question,  1 or 2 of the lettuce plants on the raft just died. 

They were doing fine and then they wilted and were done.  

Any idea why things like this happen?

[Sam Burton]

I had a similar experience a couple years back.  In my case it was a combination of lack of oxygen in the water with water temps that were too high.  I added some additional air stones to the raft tanks and things got instantly better. 

[R.K. Castillo]

I added some air stones today and it seems like the air stones bubbled the coconut coir/vermiculite mix right out of there.  

Has anyone else experienced this before?

[Farcry305]

Guessing ..High Temp water, or planting to deep (as in your plant is under water above the roots), or Ph is to high . Or the outside ait temp is to hot for leafy greens.

[R.K. Castillo]

What's the best temp for water in rafts?

I'm in Hawaii...

[Fred]

I try to keep my tank at 70F but it fluctuates based on the fish tank temps.  Air really helps.