I decided to remove the smallest plant. It does not seems to keep it as it's buds are super tiny. I don't even want to taste them 😝
At the same time there are some yellow leaves on both remaining plants.
Looks like the strategy with same old water + nutrients does not work for any other sorts of plants, so definitely for the next time I'll need to get back to PH and TDS control.
P.S. the stage of macro photos has started😎