Anyone using biobizz light mix peat free??

Forgot to say ph-balance and buffering solution you soak it in, too. ~6.0 is fine or whatever you normally do for your soilless grows.

Sounds like it is a coco coir product? Maybe, you got a bad batch that was not washed/buffered - at which point you get a substrate full of Na+ and way too much K+ while it leaches any Ca++ out of fertilizer solution. salt sickness will result in incredibly slow growth and a sickly looking plant, assuming it doesn't di from it. Each bag might be a different batch. Do they have lot numbers? It may not have all been bad. You can also buffer it with a couple 8 hour soakings. Cocoforcannabis.com has a coco buffering procedure you can trust. Believe they just use calcium nitrate, but ther are other options too. The gist is that buffering will get those cation exchange sites (CES) at equilibrium with your levels of Ca++ in fertilizer. At that point nothing is leached or added outside what you provide in fertilizer. (really equal amounts are bonding/releasing, i.e. 'at equilibrium', so it doesn't effect concentration levels at that point, if that helps you understand the chemistry of it) if you are certain you didn't mis-measure any fertilizer and the problems were consistent in every single pot you filled... a bad batch is very possible. Take it out of dumpster, run a shit load of water through it to rinse out what isn't bonded to CES, then soak it for 8 hours across 2 sessions in a calcium nitrate solution (follow instructions on cocoforcannabis, as this is just from memory). Should be something similar to Ca levels of your normal fertilization formula. the goal is getting it to equilibrium with those concentrations.

Seems crazy if people are making fake mediums and repacking them into other brands packages. Likely something went off from the shop side. Most places store this stuff in big warehouses and bugs get in the mix from there and can fuck it up or stuff gets spilled. always best to treat it with some BTi and use a IPM setup. or use hot boiling water on dry mediums to give em a quick flash. Contact the company and place you bought it from see what they say. 350L is a big loss, mostly the time involved. I'd be trying to get some answers of why.

Certainly a bad batch, and usually not on the manufacturer end. The more expensive these designer mediums and soils become the more they are subjected to counterfeiting. Past that, where your bags were stored is always a nightmare to wonder about. When I used Fox Farms, I would essentially kill the entire bag by letting it sit then refiring it up with amendments. Possibly test the next bag because your grows are fire?

I have seen someone on here using the new biobizz peet free, can't remember who it was. I once had a bad batch of canna that fucked everything up, got shed loads of pests from it, after that I bought another bag from same grow shop and had same problem so stopped buying from them. Think it wasn't stored properly. Highly doubt you forgot to grow, probably bad grow medium.

I was using old formula ( i guess ) light mix like 6 years ago. Only for seedlings till first transplant , later to All and i had A LOT OF troubles. Went for ALL MIX from start and never had issues with deficiencies. One batch of ALL MIX was bad, got thrips in both grows were i used those 15 bags. Biobizz soil quality was always stable, used it for 5 years and would gladly use still. With theirs Worm Castings/Humus had 0 problems. I read years ago, that guys got fake Fox Farm soils, maybe its the case ? Looking at your previous grows, i doubt you could forget how to grow ;)))))