Wine Cork Bubbler

As I often do when deciding I want to make something, I looked around to find something we had an abundance of...wine corks it is! Simple small plastic container, 10-gal air pump, 6 corks, little time.

I just wanted to show it off. All the clones I took last night are looking good. A few that I took a few days ago were looking very sad in rockwool and they have perked right up for the most part. One is still a little droopy, but I'm hopeful.

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No bueno on the wine bubbler. I'm getting slime on my stems. Only 3 have rooted. I thought it might not be
light tight, but in Sea of Green part 2 Hans uses clear trays with roots growing underwater with light on them. I just changed my water yesterday. pH is at 5.2. Any suggestions would be appreciated.

Common sense could have saved ya the trouble.