Used to be originally.
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Dear Sir,
We are sorry about the confusion, our website is in the process of being updated.
Initially only Bio Trace was available for Fresh and Marine water.
But with the now common use of powerful skimmers, the dosage of Bio Trace is not always enough for Marine.
This is why we released the stronger Bioptim specifically for Marine.
But you can still use Bio Trace in salt water, altrough I would recommend doubling the doses.
I hope this answers your question.
Yours sincerely,
Dr. Guillaume VANOT
Marketing & Production Manager