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Old 07-28-2012, 12:10 AM   #11
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Imo unless your exposing things that shouldn't be to air or can't match water temps/salinity pretty close then the more the better. The only reason I see to doing minimum changes spread out is to save cost and not waste water and salt
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Old 07-28-2012, 12:24 AM   #12
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Quote:
Originally Posted by crister13
Thats absolutely not too much AT ALL. When people change tanks, they use ALL new water. That's completely different water, with no I'll affects at all. I personally don't think you can change too much water, If your parameters match up.
They do that as the lesser of two evils, it is neither economical, nor wise to do that in a regular basis.

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Personally, more water changed is almost always better IME. As long as the basics are matched, "turn over" is a good thing. The water in natural reefs is ALWAYS being changed by currents, tidal flows, etc.
smaller amounts more often = more water changed.

On a monthly schedule I would not recommend more than 25% at a time for a fo or fowlr, and would recommend 10% weekly which adds up to 40% in a month.

It's important to remember our freshly made saltwater has many more nutrients in it than those ocean waters, more nutrients typically means more nuisance algae, in addition, almost all commercial salt mix will mix with measurable ammonia. Whatever you decide, let your tank inhabitants dictate whether it's too much or not, if they are thriving and you have no issues with nuisance algae, then you must have found the right schedule.
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Old 07-28-2012, 01:46 AM   #13
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10%? So. You would only change 12g on a 120g tank. Doesn't seem rt
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Old 07-28-2012, 02:21 AM   #14
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wow never thought about it before like this !!
every one has very good points

couldn't agree more about more water changes

I have been doing this for the last 6 months and am having very good out come with coral growth
and live stock
5% week 1
10% week 2
5% week 3
20% week 4
and so on
everything is just getting better and better

if it works its not broke my grand father always said that
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Old 07-28-2012, 02:41 AM   #15
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Quote:
Originally Posted by reefrunner69

They do that as the lesser of two evils, it is neither economical, nor wise to do that in a regular basis.

smaller amounts more often = more water changed.

On a monthly schedule I would not recommend more than 25% at a time for a fo or fowlr, and would recommend 10% weekly which adds up to 40% in a month.

It's important to remember our freshly made saltwater has many more nutrients in it than those ocean waters, more nutrients typically means more nuisance algae, in addition, almost all commercial salt mix will mix with measurable ammonia. Whatever you decide, let your tank inhabitants dictate whether it's too much or not, if they are thriving and you have no issues with nuisance algae, then you must have found the right schedule.
Not to get too technical but it would be roughly 34 percent water changed after 4 10% water changes if your counting the month as a whole compaired to a 25% at one time change.

But yes smaller more frequent changes are better for the tank. Less shock to the fish and coral. as stated the levels will no doubt be different in the water going in vs what's coming out. Temp ph sal etc
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Old 07-28-2012, 02:45 AM   #16
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Quote:
Originally Posted by 54seaweed
wow never thought about it before like this !!
every one has very good points

couldn't agree more about more water changes

I have been doing this for the last 6 months and am having very good out come with coral growth
and live stock
5% week 1
10% week 2
5% week 3
20% week 4
and so on
everything is just getting better and better

if it works its not broke my grand father always said that
10% a week has my vote key is matching parimeters of old water and new water use ro water new water wont cause algae blooms algae is caused by phosphate and nitrate new water should not have either of these
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Old 07-28-2012, 08:44 AM   #17
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Well I'm glad I asked! Maybe I'll just stick with the 5 gallon water changes that's I've need doing since day one. Keep the extra JIC...
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Old 07-28-2012, 09:25 AM   #18
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Quote:
Originally Posted by Hardridge
10%? So. You would only change 12g on a 120g tank. Doesn't seem rt
Because I like numbers that are easy to work with I would probably do 10g or 15g but that is every week. And 10g is going to be more than 10% of the water volume (most likely), after you account for displacement by rock and sand and coral.
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Old 07-28-2012, 10:41 AM   #19
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Originally Posted by danbstrong

new water wont cause algae blooms algae is caused by phosphate and nitrate new water should not have either of these
Nitrate and phosphate are the big ones, for sure, but the trace elements they load the salt mixes with will feed algae as well as coral.
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Old 07-28-2012, 10:58 AM   #20
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Reefrunner you seem to know your stuff and I'm only 9 months in on my BC29.

So what would a good weekly water change be for my tank?



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