I used a 50 gal box of B-ionic, loved it, mixed great, good price. Used D&D before, great stuff but had to mix for 24 hrs and left crap in the bucket and on the pumps. ESV mixes super clear and not that hard to mix. Only thing I dont like is I have yet to find any info on trace elements (ie copper, boron, etc).
One thing I read is Seachem was known in the past to have 12x borate, from what I can find the new Salinity is only 4x. The real issue seems to be the boron - depending on how they are measuring it, it can show up on our alk tesk kits as alk. Margin of error is around 10%, so if you test 7.7 DKH you're really sitting at 7.0 DKH. The other issue is they claim to be "just like seawater", seawater doesnt vary like they clain in dkh and P.H. They have since changed their website, but copper used to be listed at 5 ppb, which is 250x higher than NSW.
Here is what they had to say:
"Thanks for the email in regard to this. The numbers that
are being posted are old and inaccurate data. These
numbers were removed from our site before the product was
released and unfortunately they are still being posted on
forums with the assumption that they are current. All
parameters in salinity are targeted toward NSW levels,
including heavy metals. In order to clear up the confusion
with regard to this, we will be posting up-to-date numbers
on our site within the next couple days. From what I
understand, the heavy metal numbers in our final product
are within range of natural sea water. Please let us know
if we can answer any other questions or concerns with
regard to this or any other matter. Thank you for your
support.
Tech Support 10201"
And -
"To all:
We apologize for the confusion on the cited density of seawater at S=35. We should have cited the temperature for that density as being 15.56 C (60 F). Per Spotte "Captive Seawater Fishes", 1992, pp 28-29, the SG value at S=35 & T=16 C is approx. 1.0265 (or 1.026598 using the formula on the Salinity™ bucket -(a formula that is based upon this data in Spotte). We are well aware that SG is not the same thing as density. To arrive at the density value we cite we simply take
1.02598 * 0.9990389 g/cm^3 (density of pure water at 15.56 C)= 1.0256113 g/cm^3 which rounds to 1.026 g/cm^3 or 1.026 kg/L
That is since SG is a unitless value based on a ratio of densities we can obtain the actual density at that temperature by multiplying by the density of the reference solution (density of pure water at 15.56 C). SG=x/y where x=density of saltwater and y = density of pure water at the ref. temp (15.56 C). So to get x back we multiply SG*y as y is a known value.
But we should have cited the temperature for our density value as I imagine this would have avoided the confusion over this matter.
With respect to our formula for estimating S to within 1% requiring the use of an H value from a hydrometer calibrated at 15.56 C (60 F) and the note that most hobbyist grade hydrometers are calibrated at 75 F or 77 F the difference in the calculated values are in the neighborhood of 0.2% if one were using a hydrometer at 77F so this should not be an issue in any practical sense. We are simply citing the hydrometer calibration so that those who wish to be as accurate as possible can be, however the use of a hobbyist grade hydrometer will have no material effect (