Seaweed
If you have access to seaweed, it's well worth the effort to gather. Seaweed is not only a good soil amendment for the garden, it's a natural repellent for slugs. Mulch with seaweed around the base of plants or perimeter of bed. Pile it on 3" to 4"...
If you waited until pre-flowers to switch them over they should show with-in a week. If not they should be showing soon. Budding depends on the strain from 7 weeks up to 15 weeks.
What problems are you talking about? I also have The Jardin tent. The only problem I have with this tent is that wish it could hold more weight on the cross bars. Other then a few pin holes here and there but over all a nice tent.
I'm happy with my DR 240W. Not sure if it's the best tent and there are a few pin holes in mine if you look very closely at it. But not enough to return it.
If I was you I would always have my tap water bubbling in a different container for a few days and before you water your plants I would adjust the pH then.