• GBD videos on vimeo
  • subscribe : rss feed
  • Entry

    Seachem | Reef Salt Calcium Level

    We are big fans of Seachem Reef Salt.  It has always given us consistent numbers, Natural Saltwater (NSW) parameters, and easy mixing.     Lately there has been talk of 500+ Calcium readings.  We usually only see such high readings when nearing the very bottom of the bucket. To prevent this we mix the dry […]

    We are big fans of Seachem Reef Salt.  It has always given us consistent numbers, Natural Saltwater (NSW) parameters, and easy mixing.  

     Seachem Reef Salt

    Lately there has been talk of 500+ Calcium readings.  We usually only see such high readings when nearing the very bottom of the bucket. To prevent this we mix the dry salt before making every batch of fresh saltwater. This is common with all salts, and we encourage you to mix your salt, whatever brand it may be.

    We received a fresh bucket of Seachem Reef Salt today and mixed two 5 gallon batches with 0 tds RO/DI water @ 77F, 1.025 specific gravity. After letting the mix sit for about an hour, we proceeded to test the two batches with our Elos test kits. Here are the “results”.

    First Batch

    • Ca 450ppm  
    • Alk 8.5 dkh

    Second Batch

    • Ca 500ppm
    • Alk 8.5 dkh 

    Both batches were tested twice with the same result attained each time. There are some significant deficiencies in our testing. 

    • We only let the fresh saltwater sit 1 hour
    • SG was determined by older glass hydrometer that has not been verified in ~8 months.
    • Possible bad Elos reagents? 

    We believe there may be a problem with our Elos Calcium test kit reagents. Reagent B, the purple crystalline chemical in the small cylindrical container contains “clumps”. They seem to be more concentrated and when they are added, the solution is overly pink in color. In the tests we did none of these made there way in, but it’s very possible our reagents are compromised. 

     Elos Ca Kit

    Given we mixed the salt well, Alkalinity readings are the same, but Calcium levels differ by 50ppm we believe the error is in our part. We will be contacting Seachem to see if they can add clarity on this situation and if needed we will send them a salt sample to see what levels they attain. 

    For more info, here is a thread regarding the 500+ Ca and here is Seachem’s Forum on RC. You will notice a few that have gotten the 500+ Ca readings are half way or more through the bucket; Another reason to mix your salt before using it.

    Another post will be following this one, in which the above possible errors eliminated and results can be confirmed with another test kit, e.g. Seachem or LaMotte.

    We don’t worry too much about parameters unless we notice something is wrong. Our corals continue to grow and improve coloration and we will continue to use Seachem Reef Salt. For those using Zeovit and Ultra Low Nutrient Systems parameters are of more concern, even so, let your corals decide.

    Post a Comment

    Your email is never published nor shared. Required fields are marked *

    *
    *