Instant Ocean salt problem

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Hi, I've always liked the Instant Ocean and probably will still do but wonder if this is a make problem or age.
I've had a bucket of this salt for some time and it's always been sealed, so no reason to suspect it was off.
Yesterday, I mixed up two buckets of 25 gallons salt water to do a water change, and after a few hours it looked crystal clear and fully mixed.
Deciding to the water change today, when I came downstairs the buckets which had been running heated and powerheads had gone all milky as if something had precipitated out, this I don't understand.
Ayone any ideas? Water is Deionised RO, the bucket is on the last quarter of salt and I've read that contents can settle, so let's assume it's the salt that's done it.
But why dissolve crystal clear, then a few hours later precipitate?

ajm83

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Reply #1

Hi, I've always liked the Instant Ocean and probably will still do but wonder if this is a make problem or age.
I've had a bucket of this salt for some time and it's always been sealed, so no reason to suspect it was off.
Yesterday, I mixed up two buckets of 25 gallons salt water to do a water change, and after a few hours it looked crystal clear and fully mixed.
Deciding to the water change today, when I came downstairs the buckets which had been running heated and powerheads had gone all milky as if something had precipitated out, this I don't understand.
Ayone any ideas? Water is Deionised RO, the bucket is on the last quarter of salt and I've read that contents can settle, so let's assume it's the salt that's done it.
But why dissolve crystal clear, then a few hours later precipitate?

Hmm that's an interesting one.  Best guess I have is that the new saltwater will absorb some co2 from the air over the course of hours,  causing the ph to change.  This may affect how much calcium and mag can be held before precipitation occurs.  It is just a guess though!

That said the only time I've personally seen anything similar was when my salinity was way off. Probably worth double checking your calibration on your hydrometer/refractometer just to be safe 👍
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semiroundel

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Reply #2

UPDATE: I mixed another bucket of same salt, and this one seems to have gone clear, dunno what happened there.
Will keep posting...

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