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🌊 Elevate your reef’s glow with ionic magnesium mastery!
Brightwell Aquatics Magnesion is a 250 ml high-concentration ionic magnesium liquid designed to maintain ideal magnesium levels (1,290-1,320 ppm) in reef aquariums. Free from organic additives, it supports coral and clam skeletal growth by promoting aragonite formation, stabilizes calcium and carbonate balance, and treats up to 1,000 gallons per bottle. Made in the USA with scientifically backed purity, it ensures precise dosing and crystal-clear water for thriving reef ecosystems.









| ASIN | B001DD2PN8 |
| Allergen Information | Sulphites Free |
| Best Sellers Rank | #12,751 in Pet Supplies ( See Top 100 in Pet Supplies ) #101 in Aquarium Water Treatments |
| Brand | Brightwell Aquatics |
| Brand Name | Brightwell Aquatics |
| Customer Reviews | 4.6 out of 5 stars 435 Reviews |
| Global Trade Identification Number | 00810086010370 |
| Included Components | Magnesion |
| Item Form | Liquid |
| Item Type Name | Water Conditioner |
| Item Weight | 0.25 Kilograms |
| Liquid Volume | 8.45 Fluid Ounces |
| Manufacturer | TopDawg Pet Supply |
| Manufacturer Part Number | MAG250 |
| Model Number | MAG250 |
| Target Species | Fish |
| UPC | 810086010370 |
| Unit Count | 1 Count |
C**Y
Nice product that works as expected.
All I can say is "Brightwell Aquatics" makes some great products. I've used them for years. and trust my nano reef to them. Magnesium, Calcium, PH/Alk, pretty much anything I need to dose is from them. I have a 6 gallon nano reef tank and it can be a bit of a pain to dose, and keep parameters at the right levels. So far "Brightwell Aquatics" seems to work the best for smaller dosing without tanking or spiking.
N**N
Great product.
This works very well. My tank loves it. The coral is very happy and it didn’t have any side effects. Very easy to use and doesn’t cloud the water like others do. Great value.
K**S
Best magnesium we’ve used!
Love this magnesium! Works great for our reef tank and worth the price!! It’s not too powerful that it throws our water parameters off, but gives us a boost when needed! Have purchased multiple times and will purchase again in the future! Exactly what we needed!!
T**Y
Good supplement to help reduce the need for water changes in small tanks
Easily added. Clear liquid did not cloud or Haze water. Did not have odor. I did notice immediate positive changes in corals. I did not notice any nitrate increases when adding this product. I used this in conjunction with another of their products to help reduce the amount of water changes I needed to do.
A**R
Keeping that mg over 1300 now
I’m very happy with this. The equation in the directions gives exactly the result it says it will. While the directions say dose twice a week without doing the math, I did the math and tracked how much I needed per week and I now dose daily 10mL as that is what my tank uses every day and I want consistency. For the first three years, I never dosed when I just had my Duncan and palytoa, and they were plenty happy with very occasional water changes. But I wanted to get new coral - so I’m learning a lot. Must keep magnesium up.
T**T
Reef additive
As described following instruction.
U**S
Excellent!
While buying powder or granulate to dilute in water is cheaper. This solution is more concentrated that the one you can make with the powder so you achieve your goal faster.
B**B
A very good bargain
Price was right
C**N
Non acquistate
Mi è arrivato un prodotto diverso
Trustpilot
1 day ago
1 month ago