I'm running both coco and soil in auto pots on the same system. None have pebbles in the bottom. All are approaching or into flower and look great! 2 have AIT units in them, similar to an airdome, the rest do not. The 2 pots at the rear have the AIT in them. The pebbles are not needed.
The odd color is from the phone cam, it sucks in artificial light. These girls are dark greeen and not a spot on them.
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