Reef Complete is a concentrated (160,000 mg/L) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater without affecting pH. Calcium and carbonates are essential to all coral growth. KEY FEATURES: Liquid ionic calcium source Most concentrated calcium supplement on the market (160,000 mg/L) 100% soluble. Be wary of products that are milky white or need to be shaken DIRECTIONS: Beginner Use 1 capful (5mL) per 80L (20 US gallons) twice a week. Check calcium every 2 weeks and adjust amount or frequency accordingly. Advanced Check calcium level, then follow addition regimen above until calcium is adjusted to 380-420 mg/L. Each 5 mL/80 L (20 US gallons) will raise calcium by about 10 mg/L. Quantity or frequency can be adjusted, but do not exceed 12.5 mL/80 L (20 US gallons) per day. Thereafter, use as required to maintain calcium.
Reef Complete is a concentrated (160,000 mg/L) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater without affecting pH. Calcium and carbonates are essential to all coral growth. KEY FEATURES: Liquid ionic calcium source Most concentrated calcium supplement on the market (160,000 mg/L) 100% soluble. Be wary of products that are milky white or need to be shaken DIRECTIONS: Beginner Use 1 capful (5mL) per 80L (20 US gallons) twice a week. Check calcium every 2 weeks and adjust amount or frequency accordingly. Advanced Check calcium level, then follow addition regimen above until calcium is adjusted to 380-420 mg/L. Each 5 mL/80 L (20 US gallons) will raise calcium by about 10 mg/L. Quantity or frequency can be adjusted, but do not exceed 12.5 mL/80 L (20 US gallons) per day. Thereafter, use as required to maintain calcium.
Seachem Reef Complete 250ml
Reef Complete is a concentrated (160,000 mg/L) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater without affecting pH. Calcium and carbonates are essential to all coral growth. KEY FEATURES: Liquid ionic calcium source Most concentrated calcium supplement on the market (160,000 mg/L) 100% soluble. Be wary of products that are milky white or need to be shaken DIRECTIONS: Beginner Use 1 capful (5mL) per 80L (20 US gallons) twice a week. Check calcium every 2 weeks and adjust amount or frequency accordingly. Advanced Check calcium level, then follow addition regimen above until calcium is adjusted to 380-420 mg/L. Each 5 mL/80 L (20 US gallons) will raise calcium by about 10 mg/L. Quantity or frequency can be adjusted, but do not exceed 12.5 mL/80 L (20 US gallons) per day. Thereafter, use as required to maintain calcium.
Reef Complete is a concentrated (160,000 mg/L) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater without affecting pH. Calcium and carbonates are essential to all coral growth. KEY FEATURES: Liquid ionic calcium source Most concentrated calcium supplement on the market (160,000 mg/L) 100% soluble. Be wary of products that are milky white or need to be shaken DIRECTIONS: Beginner Use 1 capful (5mL) per 80L (20 US gallons) twice a week. Check calcium every 2 weeks and adjust amount or frequency accordingly. Advanced Check calcium level, then follow addition regimen above until calcium is adjusted to 380-420 mg/L. Each 5 mL/80 L (20 US gallons) will raise calcium by about 10 mg/L. Quantity or frequency can be adjusted, but do not exceed 12.5 mL/80 L (20 US gallons) per day. Thereafter, use as required to maintain calcium.
in 5 offers
The lowest price for Seachem Reef Complete 250ml right now is $16.00 at Bespoke Aquariums, compared across 5 retailers.
The all-time low was $11.70 on 21 Nov 2025 — today's price is 37% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 14 July 2026.
Last updated at 14/07/2026 02:13:11
Seachem Reef Complete (SC33602)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Seachem Reef Complete 250ml
Delivery between 22–24 July $12
Seachem Reef Complete Calcium 250ml
Delivery between 16–23 July $9.50
Reef Complete 250mL
Delivery between 16–22 July $39.35
Seachem Reef Complete 250ml (SC33602)
Delivery $10
| All products | Visit Herbspro Shop |
Seachem Reef Complete (SC33602)
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Seachem Reef Complete 250ml
Delivery between 22–24 July $12
Seachem Reef Complete Calcium 250ml
Delivery between 16–23 July $9.50
Reef Complete 250mL
Delivery between 16–22 July $39.35
Seachem Reef Complete 250ml (SC33602)
Delivery $10
| All products | Visit Herbspro Shop |
