Hi I just bought a new bucket of tropic marin pro reef salt, mixed it up and tested the water to see what dkh it would be because it says it should be between 7-8dkh. However when I test it it reads 9.6-9.9 in the two tests that I performed with Hanna, and similarly with the Red Sea test kit. Anyone have any ideas why the dkh is so high? I had this problem with the old tropic Marin bucket that this one is replacing as that one gave me a dkh of 10.8. Any ideas would be helpful and what I could do to remedy. Thanks
Tropic marin pro reef high dkh
- Thread starter Zach Hart
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Are you mixing your salt bucket?
I use a different brand but when it arrives, i dump the bag out into the bucket so it mixes really good.
If it was me i would be after a new brand of salt with 3 inconsistant buckets.
I use a different brand but when it arrives, i dump the bag out into the bucket so it mixes really good.
If it was me i would be after a new brand of salt with 3 inconsistant buckets.
that’s my next option. What would you recommend for Acro tank?
Specific salinity. 35ppt. Measured with Hanna and refractometer
Two consecutive buckets, of different types of salt, alk is high on both? I have a hard time believing this isn't test or salinity error.
What are you using to calibrate the salinity devices? What does the freshly mixed saltwater test for calcium and mag?
What are you using to calibrate the salinity devices? What does the freshly mixed saltwater test for calcium and mag?
my thoughts exactly. However I recalibrated both salinity tools and had my trident test the alkalinity aswell. So pretty sure it’s right. The salt was tropic Marin pro both times just a different batch
will check in a minute
Try mixing by cup and see what you get. I ended throwing out two refractometers...I only trust my high-precision TM hydrometer.
Well I try to keep dkh around 7-8 coz I’ve got acros. When I do a water change using 10dkh water it causes a spike in alkalinity
By cup do you mean like grams? I’m in uk lol
At this point I would verify 100% your salinity calibration solution is correct. If it's not one of those 35 ppt pouches (like the ph 7.0 and 10.0 things) and it maybe an older bottle or something I would be questioning it for sure.
If they're also high it's almost certainly high salinity
Lol. Per TM Pro instructions...
To achieve a salinity level of 32–35‰ (psu), dissolve 35 ml (approx. 37–40 g / 1.3–1.4 oz.) of Tropic Marin® Pro-Reef for every litre or 0.5 cup (approx. 140-150 g) for every US-gallon of water in a container, circulating continuously.
It’s the Hanna calibration solution packet so it should be right
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- Joined
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Why dont you try it and let us know
Na mixing didn’t help. And neither did mixing the salt in exact weight. Still testing 9.8dkh but the calcium is 430 now instead of 390 like it was before
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