Reef Salt Box 10 kg — Economical Boxed Reef Salt for SPS and LPS - Aquaforest

Aquaforest Reef Salt Box 10 kg — reef salt for SPS and LPS in an economy cardboard box

The Reef Salt Box 10 kg ships Aquaforest's Reef Salt recipe in an economy cardboard box sized for mid-range reefs. The recipe matches the bag and bucket versions: amino acids to feed coral tissue growth, vitamin C to support inhabitant immunity, macro-elements aligned with SPS/LPS targets. The cardboard box stores upright and takes less footprint than a rigid bucket.

It makes about 68 US gal (258 L) of ready reef water — a full month of 10 % weekly changes on a 65 US-gal display, or three large changes on a mid-sized system.

Which tank fits this size

• Reef tanks 30 to 90 US gal — right volume to cycle through the box without long storage.
• Aquarists who prefer a box over a bucket — compact cardboard, lighter to handle and store.
• Mixed-reef and moderate SPS tanks — parameter targets aligned without macro overload.

Aquaforest official parameters (33 ppt, 24 °C / 75 °F)

• Magnesium (Mg): 1,300-1,360 mg/L
• Calcium (Ca): 410-430 mg/L
• Potassium (K): 360-380 mg/L
• Strontium (Sr): 7.2-8.8 mg/L
• Alkalinity (dKH): 7.4-8.2
• pH: 8.0-8.2
• Bromide-free, phosphate-free, nitrate-free
• Enriched with amino acids + vitamin C

Official preparation

• Dissolve 390 g of salt per 10 L of RO/DI water to hit 33 ppt.
• The 10 kg box makes about 258 L of reef water.
• Recommended dissolution temperature: 24 °C (75 °F).
• Vigorous stirring for about 15 minutes until the water is perfectly clear.
• Final refractometer check — target 33-35 ppt.

Specifications

• Brand: Aquaforest (Poland)
• Format: 10 kg cardboard box (yield ~68 US gal / 258 L)
• Type: reef salt with amino acids + vitamin C
• Compatibility: mixed-reef, moderate SPS, LPS, soft coral

Why choose Aquaforest at ReefSolution

• Reef Salt Box 5×5 kg — five individual 5 kg bags that keep the salt fresh for high-volume buyers.
• Reef Salt Bucket 22 kg — the best price per kg for heavy users.
• Reef Salt+ Bucket 22 kg — the elevated-macro version for very densely stocked SPS tanks.

Frequently asked questions

What's the difference between the Reef Salt Box 10 kg and the Box 5x5 kg?

The salt inside is identical. The Box 5×5 kg holds five separately sealed 5 kg bags — each bag stays closed until opening for maximum freshness. The Box 10 kg is a single container opened once and resealed between preps.

How much reef water does the 10 kg box make?

About 258 L (68 US gal) at the official 390 g per 10 L ratio at 33 ppt salinity. Roughly a month of 10 % weekly water changes on a 65 US-gal reef.

Does the cardboard box protect the salt well?

Yes — the salt sits inside a sealed inner plastic bag inside the cardboard. Once opened, reseal the inner bag carefully and store in a dry location to limit humidity pickup that causes salt to clump.