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FAQs

Q: What's in a Marinemix?

Q: All salts are the same, aren't they?

Q: Do salts with higher calcium levels dissolve more slowly than salts with inadequate levels?

Q: Why do some brands of salts dissolve unnaturally fast?

Q: What is the difference between Crystal Sea® Marinemix and Crystal Sea® Bioassay Laboratory Formula?

Q: What do I need to know about mixing up fresh saltwater?

Q: What do I need to know about mixing up fresh saltwater?

A:
Crystal Sea® Marinemix Mixing Instruction Check List
  1. Make sure your mixing container is saltwater safe.
    **Note: a plastic bucket or container is recommended (one that is clean and never contained other chemicals). The Crystal Sea® 150 gallon size mixing bucket is ideal. It includes a unique measuring scoop and “fill line” on bucket to produce 4 gallons (15.12 liters) of saltwater @ 1.023 specific gravity.
  2. If not using a Crystal Sea® mixing bucket and measuring scoop, add TAP water or R/O-D/O water to container. Adjust temperature to 75 degrees F (24 degrees C). Use one (1) pound (.454kg) of Crystal Sea® to produce four (4) gallons (15.12 liters) of seawater at specific gravity of 1.023. We recommend a specific gravity of 1.021 to 1.023 for Marine Fish Aquariums and 1.025 to 1.026 for Reef Systems. Add more freshwater if specific gravity is too high, or more Crystal Sea® if too low. Crystal Sea® Marinemix automatically de-chlorinates tap water (contains Sodium Thiosulfate). Crystal Sea® Bioassay Laboratory Formula does not contain de-chlorinator.
    Caution: Do Not use mixing instructions from other salt companies. Crystal Sea® utilizes dry, crystalline elements. Other salts may contain more moisture, resulting in improper specific gravity.
  3. Always check specific gravity carefully. Adjust to desired level. We recommend any of the five (5) models of glass or plastic models from Marine Enterprises. They are standardized at 75 degrees F (24 degrees C) for accurate results.
    Caution: Certain hydrometers on the market are notably inaccurate, leading to incorrect specific gravity. If in doubt, check against a Marine Enterprises Professional Laboratory 12” hydrometer (can test the specific gravity of freshwater at 1.000 for accuracy comparison). A refractometer may also be used for this purpose.
  4. Freshly made Crystal Sea® make up water may be used immediately. For best clarity results, aerate for 24 hours in mixing container. (See R/O-D/I precautions below). Crystal Sea® Marinemix contains 74 elements. It may take slightly longer for this complex formula to reach equilibrium and fully clear. As many research studies have shown, your marine life will benefit. Crystal Sea® has successfully maintained all forms of marine life in Public Aquariums, Research Facilities, Marine Wholesalers, Dealers and Hobbyist systems … for over 4 decades. Water should be kept to a maximum of 25% for each change. More frequent water changes of 10% to 20% are recommended for system stability.
    Caution: When transitioning from another brand of salt to Crystal Sea® Marinemix, make no more than 5% water changes. Other brands may contain high levels of E.D.T.A. (chelating agent). This substance can accumulate in systems and affect accurate testing and utilization of many elements. The U.S. E.P.A. has referenced Crystal Sea® Marinemix as the replacement for Natural Seawater at its’ Acute Toxicity Labs since 1988. Crystal Sea® does not contain E.D.T.A.
  5. R/O (reverse osmosis) - D/I Deionization Precautions: If using R/O - D/I make up water:
      a. Hard water (contains high levels of Calcium and Magnesium) may clog the R/O membrane in a short time period, rendering it ineffective. An R/O Flush Kit may be required to remedy this.
      b. A fair percentage of R/O membranes are reported to be defective. A TDS (Total Dissolved Solids) meter may be required to continually monitor the membrane.
      c. Existing water pressure may not be sufficient for R/O membrane to operate efficiently. An R/O Boosting Pump may be required.
      d. Municipal Water Treatment Chemicals (polyphosphates) may affect R/O membrane performance. Check with R/O manufacturer and/or water department.
      e. Be sure to follow instructions for D/I replacement so that unit operates properly.
      Caution: Failure to follow the above may result in newly made saltwater being cloudy (caused by excess Calcium, etc. bypassing membrane). It is unwise to use this water in Marine System. R/O-D/I unit needs to be serviced before new make-up water is produced.
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