Using Real Seawater

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Hi all,

Just back from visiting a new marine fish shop not far from me and the I was speaking to the owner who told me he uses sea water that he collects as the tide comes in for all his marine tanks and shop system. As I live right on the sea I would really like to do this if it's possible. Has anyone tried it or does anyone have any reasons why it's a bad idea?

Steve's Marines

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Reply #1

Some people do it with no problems but you never know what pollutants you could be adding.  Unless you can test for everything there's always a chance of something nasty getting in. Did you ask what his filtration was like?..., I'd do it if I lived in Hawaii or on the great barrier reef  :glad:
Last Edit: Aug 28, 2016 6:50:57 pm by Steve's Marines
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ChrisHibs

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Reply #2

Some people do it with no problems but you never know what pollutants you could be adding.  Unless you can test for everything there's always a chance of something nasty getting in. Did you ask what his filtration was like?..., I'd do it if I lived in Hawaii or on the great barrier reef  :glad:

Didn't see his filtration in any great detail. He took me and showed me the 1000 litre drum outside that he keeps the seawater he collects in ready to use though!

Gav

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Reply #3

Hi Chris.  You'd possibly also have to check the salinity too over a few weeks at different times to ensure that it is all sea water being at the mouth of the rivers , salt and freshwater can sit in layers in the river mouths and estuaries .

Asco1104

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Reply #4

I'm sure I read the salt level is higher so needs to be watered down with RO but I might be wrong.

ChrisHibs

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Reply #5

He did say it was important to try and collect your water from the incoming tide and advised me to go up to Fortrose to collect as the water up there is perfect!

Looking into it there seems to be a few people who have done this and is really like to give it a go. I have a spare 64l tank that I'm thinking of setting up and filling with real saltwater as a wee experiment before I go any further though.

ChrisHibs

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Reply #6

Sorry meant to say he made a point of telling me a few times that it doesn't have to be diluted. He's been running marine tanks this way for 15 years.

Gav

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Reply #7

Certainly worth a shot , yeah out passed Fortrose would be best bet , if your going to try I'd probably use a pair of waders so that you could get out passed the wash would probably be less silty .
I think the dilution thing comes from difference between 1.025 dSG we measure our salt at , and 35 ppt of natural sea water not being the same salinity .

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