Not Grow Big, Big Bud made by AN. They have an organically derived version too. Lower in P than K at 0-15-35 with 20 amino acids, 10% S, citric and ascorbic acids.
I grew in Rubbermaid tubs, no rez, and every 3 days would top up to an inch under the net pots, wait a bit to let the bubbles mix everything up then check ppm. It would have dropped some depending on how many plants and their size so I would guesstimate how much of each nute to add back to raise the ppm to my target level and just use a syringe to squirt little bits of each into the tub to get back. When you flip to flower in just a few days the drop would be a lot more and after monitoring for a few grows found it could increase up to 4X during the stretch which means the plants are feeding like crazy. Right after the stretch the daily drop would slow down to before flower levels and begin slowing as flowering went on.
If you use the AN don't ever try to adjust the pH. Most people do and it screws it right up. Seems to want to read around 6.2 and works just fine sitting there.
I just got 3 - 1L bottles of their Jungle Juice so will be checking the pH when I start using it as it's not pH Perfect but uses the same formulation as the old 3-part and is about twice as concentrated. Got a new small can of the BB powder too. I'm hoping it comes out at a decent pH when mixed up in RO water so I don't have to adjust.
Got this chart for DWC but never really used it myself.
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