I stay away from organics in hydro with the exception of some very small amounts in my mega crop that I use.
I have never used the product but a word of caution with organics and hydro. If you are running sterile don't use any organics period. If you are running live a small amount usually does not create an issue but always start with a tiny amount and wait 24 hrs to see how the system reacts.
I'm only using megacrop line. I have Mammoth P and Recharge. Was going to use recharge for veg, and start mammoth p during flower like I usually do with soil.
I just looked it up. I can't see a reason not to use it. But just know soil bacteria and hydro bacteria are different. So you will likely need to add it once a week or so to keep populations optimal.
I use hydrogaurd and the same goes for that. The particular strain is not very well suited to aquatic environment even though it's marketed for such purpose. It's this reason I use peat pellets for seeds and clones I my system. It provides an ideal area for these bacteria to reproduce not usually found in most systems.
That mammoth p is a good alternative to monopotassium phosphate.
There is a lot more I could go into on this but I won't clog up your post
I'm only using megacrop line. I have Mammoth P and Recharge. Was going to use recharge for veg, and start mammoth p during flower like I usually do with soil.