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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
4.2 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 3
Legs curl up, panty liners don't stick, front and back are cut exactly the same.
I wear a pants size 8, and purchased an XL in these because I don't like tight underwear. They feel good, and fit well -- not baggy and not tight. However, the legs do curl up, which I might have expected if they were tight, but they're not. Panty liners stick at first, but not all day. And although there is printing on the inside back to provide a clue about what is supposed to be front vs back, there is no difference in the cut. The waist hits a bit lower in the back (on me) than in the front, which is not a deal killer, but, REALLY?? I'll keep these, but will keep looking for a better fit, and legs that don't curl up.
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Reviewed in the United States on July 25, 2022
★★★★★ 5
But - you can’t always figure out the back or front
Easy to wash and a good fit.
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Reviewed in the United States on July 27, 2025
★★★★★ 5
Excelentes
Color: Set8-4, Size: XX-Large
Lindos, cómodos y el materia no se marca sin ser delgados
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Reviewed in the United States on February 10, 2026
★★★★★ 5
Great non plastic shirt for exercise and daily wear
Color: Claret, Size: Large
Soft and comfortable. Breathable material for exercise. Fits well (L, 5'3",150lb). Wish it was and inch or 2 longer
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Super nice shirt!
Color: Black, Size: Small
I actually bought this shirt to wear under zip-up hoodies. It's super soft and cozy. It washes up great and is very durable. I just ordered two more in different colors! A great value - perfect!
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Reviewed in the United States on March 16, 2026
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