Seaweeds may drastically lower PH to dangerous levels?

[DavTom]

Originally Posted by Ray

Davide - I did that testing a good 15 years ago or more. I have not bothered adjusting my solutions since, and I have experienced no issues.

That said, I basically only use 3 products on them, so that's been a constant.

OK, Ray. Sorry I could have stopped this conversation earlier, but this did not come clear to me from your previous posts. I wrongly thought you had checked only the PH and not also the H3O+ concentration.

One last point still related to PH. What do you think about low PH and micronutrients toxicity? Some microelements (in particular iron and manganese) become drastically more available for plants uptake at lower PH and this may easily lead to toxicity. Frankly speaking, I do not know if this has a dependency with H3O+ concentration.

What are your thoughts about this? Did you do any tests, or you simply assumed there is no problem because your plants are doing fine since a long time?

Dav