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Description
Sera Marin Component 1 Ca 250ml[Volume - 250ml]Contains essential calcium necessary for the development of coral skeletons and other invertebrates. It is recommended to use this alongside Sera marin COMPONENT 2 and Sera marin COMPONENT 1 Ca calcium formulated specifically for seawater. The complete series of Sera marin COMPONENT 1 7 is designed for advanced marine aquaristics, providing corals and various lower animals with seven beneficial ingredients that work harmoniously together. Sera marin
Contains essential calcium necessary for the development of coral skeletons and other invertebrates. It is recommended to use this alongside Sera marin COMPONENT 2 and Sera marin COMPONENT 1 Ca - calcium - formulated specifically for seawater. The complete series of Sera marin COMPONENT 1 - 7 is designed for advanced marine aquaristics, providing corals and various lower animals with seven beneficial ingredients that work harmoniously together. Sera marin COMPONENT 1 Ca supplies vital calcium for the formation of skeletons in corals and other lower animals. The optimal calcium concentration in water should range from 400-450 mg per liter. You can easily check the calcium levels using the sera Ca-test. When Sera marin COMPONENT 1 and 2 are combined, they help achieve the ideal pH level found in seawater and maintain the natural balance in your coral aquarium. Dosage: Use the cap as a measuring tool. Always add one capful of Sera marin COMPONENT 1 and 2 for every 100 liters of seawater, allowing a 2 to 3-minute interval between additions. It is important not to raise the calcium level by more than 20 mg/l in a single day.Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
I couldn't be happier
The quality is very good looks great on very happy with the style.
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Reviewed in the United States on April 5, 2026
★★★★★ 4
Thin, but dont let that stop you from buying.
Soft, looks nice, and im a fan in general. The things i do want to address is that its pretty thin fabric, and that even when i ordered the smallest size it was just a tad to big all around. Decent enough for the money tho.
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Reviewed in the United States on November 5, 2025
★★★★★ 5
Light long sleeve
Nice fit
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Reviewed in the United States on March 10, 2026
★★★★★ 5
Design
Design and fit perfect
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Reviewed in the United States on November 25, 2025
★★★★★ 3
Very Thin but NICE
This polo shirt is much thinner than expected. While the blue color is vibrant, it’s best worn with a layer underneath, such as a mock turtleneck. I recommend ordering a size up, as the viscose fabric tends to shrink more than cotton. For care, hand wash or place it in a mesh laundry bag and use a gentle cycle. Despite these considerations, the shirt is attractive and practical when properly cared for, and I may purchase another in a different color.
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Reviewed in the United States on January 11, 2026