Went out and checked the nutrient strength and level. CF = 24 and the level was actually not all that bad probably almost 5" but I decided to add water. After I added the water the CF had fallen (at least transiently) to CF = 19 so I added a cup of concentrate and that raised the nutrient strength to a quick look of 23. We'll have to see what the equilibrium level will be.
Watered the garden for a while too. There are lots of green tomatoes in both the float system and the garden but none have started to turn red yet. So at least if there is a nice rain intervening the hold time between refresh is nominally five days.