PSA Excess Kelp Causes Arsenic Issues

PSA about over using Kelp.

Last year I ran into 2 farms who contacted me after failing for Arsenic after over using kelp extract for there potassium source. Both farms tested over the legal limit for heavy metals in tissue testing as in most states every 10 lbs of tissue must be tested as are all concentrates.

This year already I have been contacted by 3 different farms and its not even May. One of the farms was 4x the legal limit for Arsenic. This can’t just be a cannabis issue I am more than willing to bet alot of lettuce growers would test outside of the legal limits if we are seeing this kind of results in tissue samples in cannabis.

PLEASE be careful when suggesting kelp. It is safe to use when used reasonably but if you over dose it or think its going to solve your mystery plant deficiency or some one one told you that you only need kelp with iron and fish food please stop because this could become a much bigger issue for all of aquaponics if we don’t address this as a community quickly. So if your suggesting kelp as the best source of K for aquaponics please stop.

TLDR; Over dosing Kelp causes Arsenic accumulation only use it in small ammounts.

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Got ANOTHER result back today from an aquaponic producer who was following some bad advise from another aquaponic producer in Oklahoma. This is really becoming a problem this year for some reason especially with poorly thought out aquaponic cannabis systems by some of the newer companies on the market. Be sure you get your aquaponic cannabis and nutrient info from an actually reputable source so you can actually sell your product unlike this poor client who can not.

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Whoa, that’s scary stuff, has anyone else seen this?