2HR Aquarist APT Sky
$15.99
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2HR Aquarist APT Sky
$15.99
Usually ships in 1-2 business days from our fulfillment center
Replenish calcium and magnesium in your RO or RODI planted aquarium with APT SKY by 2HR Aquarist. Its powdered formula dissolves quickly and makes it easy to tweak General Hardness (GH) without affecting Carbonate Hardness (KH), pH, or NPK nutrient levels.
A small amount goes a long way, making routine remineralization simple and economical.
Best For
- Soft water planted aquariums
- Freshwater aquarium shrimp
- Freshwater tropical fish such as Tetras
- RO and RODI water remineralization
Product Highlights
- Replenishes calcium and magnesium without increasing KH
- Preserves water chemistry
- Helps maintain water conditions preferred by many aquatic plants, shrimp, and tropical fish species
Choosing the Right APT Remineralizer
Choose APT SKY if you want to increase General Hardness (GH) without affecting Carbonate Hardness (KH). Choose APT SKY PLUS if you want to increase both GH and KH in a single step.
Size: 150g Powder
Dosing Instructions: Pre-mix 3.5g (5ml) per 16 Gallons of RO/RODI water.
Each 3.5g dose adds approximately:
- Calcium: 12ppm
- Magnesium: 3.5ppm
- General Hardness: +2.5dGH
TIP! Dissolve APT SKY completely in a separate container before adding it during water changes. This helps ensure even mineral distribution throughout the aquarium.
Ingredients:
| Calcium (Ca) | 21.5% |
| Magnesium (Mg) | 5.4% |
| Boron (B) | 7mg/L |
| Copper (Cu) | 1mg/L |
| Iron (Fe) | 0.06% |
| Manganese (Mn) | 17mg/L |
| Molybdenum (Mo) | 0.01mg/L |
| Zinc (Zn) | 9mg/L |
| Seaweed extract | <1% |
About The Brand
2Hr Aquarist is trusted for exceptional liquid fertilizers and water treatments that focus on beautiful aquarium plant growth. Co-founder Dennis Wong has spent many years in the planted tank hobby, furthering and sharing his aquatic plant knowledge with the community. He has become a trusted source for cultivating and understanding some of the most difficult and rare plants in aquascaping today.
Reviews by real customers
Shipping, Returns and Refunds
Shipping
Orders are typically processed within 1-2 business days M-F. However, additional time may be required during peak seasons and federal holidays. For orders containing live plants, we exercise extra caution and assess factors such as travel distance and weather to ensure safe transit.
To avoid delays, please ensure all order information is accurate and complete. We cannot offer refunds and are not responsible for orders shipped to incorrect addresses due to errors in provided information. Once an order has been shipped, delivery times are determined by the carrier and are outside of our control. On average, shipments arrive within 2–5 business days, excluding weekends and holidays. For more information, please visit our FAQ page.
Returns
If you are not satisfied with your purchase, please contact us within 48 hours of delivery. Approved returns must be shipped back within 14 days of approval. Returned items must be unused, unopened, and in their original packaging. Specific return requirements, if applicable, will be listed on the product’s page. For more information, please visit our FAQ page.
Refunds
No worries, we’ll take care of everything as long as it fits the guidelines above.Most answers to general questions can be found on our FAQ page.