Cal Mag'd Coco | 100% Loose + Freshly Buffered Top Shelf Coco Coir | Never Buffer Your Coco Again | Stops Nutrient Leaching | Prevents Nutrient Lockout

Pre-Buffered Coco Coir Built to Stop Cal-Mag Lockout, 10L

Raw coco coir is hungry: it strips calcium and magnesium out of a feed before a plant ever gets to use them, which is why growers either buffer their own coco or buy coco sold as "cal-mag'd." The catch is that a lot of coco marketed that way has simply been rinsed to a low EC, which is not the same thing as buffered — a rinsed brick can read clean on a meter and still pull cal-mag out of the feed in the first week. Cal Mag'd Coco from Max Yield Labs runs every batch through a dual-stage cation exchange process: a calcium nitrate and magnesium sulfate soak, drained and repeated with fresh solution, then rinsed below 0.4 EC, so the medium's exchange sites hold calcium and magnesium rather than stripping them from the feed.

The 10L bag suits hobbyist growers or anyone trialing a buffered coco base in a few containers before committing to a larger volume.

Key Features & Benefits

• Dual-stage cation exchange buffering — a calcium nitrate and magnesium sulfate soak run twice, then rinsed below 0.4 EC.
• Cal-mag built into the medium — reduces the need to dose cal-mag separately at every feeding.
• Low starting EC — washed below 0.4 EC so growers can dial in their own nutrient program from a clean baseline.
• 10L trial size — sized coverage so growers can plan container counts before ordering.

Who Should Use This Coco Coir

Growers who want a coco coir base with calcium and magnesium already built in, rather than buffering raw coco themselves or dosing cal-mag manually at every feeding.

About Max Yield Labs

Max Yield Labs buffers each batch of Cal Mag'd Coco to order and ships from its facility in Elmira, NY. Every bag comes with a 30-day satisfaction window, and the company can be reached directly at support@maxyieldlabs.com with questions before or after purchase.

Frequently Asked Questions

What's the difference between "cal-mag'd" coco and coco that's just rinsed to a low EC?

A low EC reading only means soluble salts have been rinsed out — it doesn't mean the coco's exchange sites have been saturated with calcium and magnesium. Coco that is only rinsed can still strip cal-mag from a feed even though it tests clean on an EC meter, while a properly buffered medium has calcium and magnesium bound into the coco itself.

Do I still need to dose cal-mag with my regular nutrients?

For most feeding programs, no separate cal-mag dosing is needed since the medium itself supplies it; run your normal base nutrients at your normal pH and let the buffered coco handle the calcium and magnesium side.

How is this coco actually buffered?

Each batch goes through a dual-stage cation exchange process: a concentrated calcium nitrate and magnesium sulfate soak, drained and run again with fresh solution, then rinsed below 0.4 EC so the coco's exchange sites are saturated rather than just flushed.

How do I use this coco when it arrives?

Hydrate the coco, let it drain, and plant directly into it, running a normal base nutrient program at a normal pH from there.

What if a bag doesn't arrive properly buffered?

Every bag ships with a 30-day satisfaction window; contact Max Yield Labs directly at support@maxyieldlabs.com if a bag doesn't arrive buffered and ready to plant.