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 100ml
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 10 offers
The lowest price for Seachem Reef Complete 100ml right now is $8.00 at aquateesfishland.com.au, compared across 10 retailers.
The all-time low was $7.20 on 30 Nov 2025 — today's price is 11% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 10 Sept 2026.
Last updated at 10/09/2026 06:02:32
Seachem Reef Complete (SC335)
Delivery $7.99
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 100ml
Seachem Reef Complete 100ml (SC335)
Delivery $9.99
Seachem Reef Complete 100ml (SC335)
Delivery $9.99
Seachem Reef Complete 100ml (SC335)
Delivery between 15–23 Sept $8.95
Seachem Reef Complete Calcium 100ml
Delivery between 14–21 Sept $9.50
Seachem Reef Complete 100ml
Seachem Reef Complete 100ml
Free delivery between Mon – Wed
Reef Complete 100mL
Delivery between 12–18 Sept $37.69
Reef Complete 100ml S335
originally posted on ebay.com
*:.Thank You!.:**:. Highly Recommend:**:.Asset to eBay.:*
originally posted on petmountain.com
You must have this item to Complete a show tank! I highly recommend this product!
originally posted on petco.com
This product takes care the reef needs in 1 bottle; no need to collect a basket full of products to get what you need.
Seachem Reef Complete (SC335)
Delivery $7.99
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 100ml
Seachem Reef Complete 100ml (SC335)
Delivery $9.99
Seachem Reef Complete 100ml (SC335)
Delivery $9.99
Seachem Reef Complete 100ml (SC335)
Delivery between 15–23 Sept $8.95
*:.Thank You!.:**:. Highly Recommend:**:.Asset to eBay.:*
You must have this item to Complete a show tank! I highly recommend this product!
This product takes care the reef needs in 1 bottle; no need to collect a basket full of products to get what you need.
This is nice since you dont have to worry about mixing powders. This is already premixed with mag and stront as well. So check your levels. My tank resently dropped horribly in cal, small amounts in mag, and no alk. So this worked really well for me. Read the directions and take it slow. Jumping ppm can be bad even if things are low. Water change Water change Water change. But if that isnt working and you need a bit more. This is the product for you.2 negatives.1)It is a bit pricy2) there is nothing between 250ml and 2 liters. a nice 500ml-1L would work great. i have a 30 gal reef so a tiny bit goes a long way.
Great product, have used for years.Doesn't seem to go bad.Have had old formulation that turned cloudy, was told it was Strontium precipitating out, but was still good.This doesn't happen any more. Great for keeping Calcium levels high to promote coral growth.\n\nExpensive unless you buy in bulk.
Great product, I have used it many times, and can see a difference in my tank!
I've been using Complete and Carbonate (liquids) for years. Big Al's does the best packaging ,tape over the bottle caps and plastic bagging, no more wet and leaking delivery boxes. Thank you for taking that little extra taping step. I'm your customer from now on !!
I have had my saltwater aquarium for about 5 years and there has been a lot of experimenting with products. I have used different product but this product eliminates the frequent testing of your water.
I have been using this pdyoduct for over two months now and I really see a difference in my corals. Plus the Mg helps to keep my dKH at a prime levels.
This product worked for me in raising my Calcium level
