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Description
THC Cal-MagCalcium and Magnesium are two very important elements for strong plant growth. Calcium and Magnesium are the most abundant minerals in tap water and will influence the water hardness. Normal water has an EC level between 0. 4 and 0. 7. Soft water has an EC of 0. 3 and below. Hard water has EC 0. 8 and above and has more Ca and Mg than the plant can handle. Best way to treat that is with Reverse Osmosis. Calcium deficiency will start with weak stem,
Calcium and Magnesium are two very important elements for strong plant growth. Calcium and Magnesium are the most abundant minerals in tap water and will influence the water hardness. Normal water has an EC level between 0.4 and 0.7. Soft water has an EC of 0.3 and below. Hard water has EC 0.8 and above and has more Ca and Mg than the plant can handle. Best way to treat that is with Reverse Osmosis. Calcium deficiency will start with weak stem, dark foliage and slow growth rates.
Once calcium is locked up in plant tissue, it can't translocate to other parts of the plant so deficiency symptoms will show in new growth, usually as yellow / brown spots surrounded by sharp brown edge. Unlike Calcium, Magnesium is a mobile element where in case of deficiency available Magnesium will be transported from lower leaves to newer growth where it is needed most.
Symptoms are yellowing between veins and / or rusty brown spots on older leaves. Magnesium is an essential in chlorophyll - that's what makes the plant green, plays major role in photosynthesis, activating enzymes and transporting sugars whilst calcium plays a crucial role in strengthening the cell wall structure. Calcium helps regulate the flow of water movement in cells and acts as a buffer when excess of other elements are present. A constant supply of calcium is needed for continued health plant growth.
Therefore when THC Cal-Mag supplement is used, roots are able to uptake nutrients more freely, meaning your plants receiving more usable levels of not just calcium and magnesium, but also other important element too. In addition the translocation of nutrients once inside the plant is enhanced.
THC Cal-Mag provides the vital minerals of magnesium and calcium to your plants which helps to strengthen and accelerate their growth. THC Cal-Mag also stops your plants from forming unwanted deficiencies such as yellowing leaves and stunted growth. THC Cal-Mag is a concentrated blend of readily available calcium and magnesium, is fully soluble, won't clog your drip emmiters and can be combined with fertilisers.
THC Cal-Mag optimises your nutrition with two supplements to prevent secondary nutrient deficiencies and builds stronger plant structure. Some plants require high levels of Calcium and Magnesium to thrive and avoid issues with plant growth and production. E.g tomatoes lacking calcium develop blossom end rot or capsicums deficient in magnesium will suffer from yellowing and drooping leaves.
Calcium and Magnesium can also be blocked when pH is too low.
Benefits:
- Hardens soft water
- Increases the level of calcium and magnesium in your plant
- Improves the quality and overall health of your plants
- Prevents and solves mineral deficiencies
- Promotes plant growth
- Helps to raise and stabilize EC levels to correct range
- Improves leaf growth, enhances cell structure, aids plant health
- Improves fruit and flower production by increasing nutrient uptake
Directions:
Use 1ml per 1 Litre of nutrient solution or water.
When growing in coconut substrate or using prepared soil or soilless mixes, pre-buffer your substrate by adding 1ml per Litre of water, adjusting pH to 6.0 to wet the media, and then to nutrient solution for the first three weeks of vegetative phase.
Continued use may be helpful for fast growing annuals, high Ca and Mg demanding plants or when calcium is in short supply. It is important not to overdose THC Cal-Mag as it may cause negative effects.
Use 1ml per 1 Litre of nutrient solution in case of deficiency. Maintain pH level between 5.8 and 6.3.
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4.6 ★★★★★
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Product Reviews
★★★★★ 5
Super comfy, roomy, great quality!
Size: Medium, Color: Calypso Blue
These are so cute! They fit nicely, actually run a bit big but that’s probably intentional. I’m short, just a little over 5 feet tall and they are the perfect length for me. I got a medium, i normally wear some mediums and some larges. They are lightweight denim and great quality!
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Sturdy fabric, well made.
Size: X-Large, Color: Royal Blue
I LOVE these pants!!!
Who buys pants online??? I NEVER do, but I took the chance band I absolutely adore them!! I’m 5”10’ 200lbs and they are so super comfy and look fabulous on me too. (If I do say so myself)
Wore them to the baseball game and got three compliments.
Might order another pair?
Seriously, they are well constructed. Good solid material with just enough stretch. The pockets are actual Pockets.
I seriously love them.
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Reviewed in the United States on May 23, 2026
★★★★★ 4
Great fit, good quality, horrible smell
Size: X-Large, Color: Calypso Blue, Size: X-Large, Color: Calypso Blue
Surprisingly decent for the low price. Love the details. Fit is good, but I sized up based on the measurements (I wear a 14 but bout the XL/16-18) and I like the looser fit if them. Would honestly rate 5 stars, but there was a HORRIFIC little fragrance pie thing stuck in the bag... I'm sure, based on how many people I walk past in the world stink of hyper-scented laundry detergent, that this is not a problem for some folks, but many people also have fragrance sensitivities, and this can be not just problematic for some, but dangerous. I had to wash these jeans 4 times before the odor went away enough for me to wear them. So that was disappointing, but otherwise, I'm a fan.
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Reviewed in the United States on June 7, 2026
★★★★★ 5
Perfect
Size: Large, Color: Calypso Blue
Love these! Perfect fit. Ordered normal size! They are a bit loose but look great that way! Very comfortable!They are perfect length at my ankles and I'm 5'3"
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Worthy
Size: Small, Color: Calypso Blue
I have to say, I seldom receive something thru Amazon that's 100% worthy! I wear F P & AE & these look just like the model! I usually wear a M, but knowing how fp sizing is, I got the S. Fits perfect with even a bit of room. Im 5'3", 127lbs, 27 waist. Definitely great with flats, but I'm not sure yet with any other than tennis shoes. The paint splatter on mine are less than picture....no complaint here. They have a bit of stretch, I like real jeans, so I can live with it. They are soft & actually made well. Only downside to this order, Amazon made me purchased over what I wanted to, to get it by promise date, never happen & getting very common with that trick, not appreciated, so beware you may not get them on promise date
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Reviewed in the United States on April 4, 2026