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Discussion Starter · #1 ·
I have a 75 gallon now that I do a 1% daily water change on - actually just a gallon a day for simple measure.

I am going to be setting up a 14 gallon biocube to get some live rock out of my sump while I do renovations and to make a temporary home for my maroon clown as I make another attempt with a GBTA here soon.

I'm hoping to just move the biocube to my office once that's all done - here's the deal though.

My plan is to take one of the 1 gallon water change from the home tank and use that to make weekly 5-7% water changes for the biocube (power compacts so likely softy dominated with some LPS).

If I take a gallon of "used" water change from the home tank to the office - will it "keep" for about a week if I don't use it right away?
 

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Discussion Starter · #4 ·
Saltybiker - that was my next step, just hang onto a gallon for a week and test it.

9secGSXR - normally yea, but I'm looking at two things. First daily changes, a strong skimmer and a generally low nutrient level in the main tank at home for an LPS heavy tank means that water will be relatively clean for a Biocube softy tank. Second, with so much extra water from the main tank at home (a gallon a day) I can afford to do a relatively large % water changes for the biocube - 50% weekly if needed. My measured nutrients are almost always 0 (had an organic phosphate issue awhile back but that appears resolved for the moment).
 

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Discussion Starter · #8 ·
G ~ I agree. Added good stuff - removed bad stuff. No doubt.

Wouldn't recommend it if I was just using the water from a 75 to change water in a 75 or even 55 or 30. On the other hand - the water that was moments ago just fine for a LPS tank when making a 7% change daily or every other day on a nano for soft coral is probably just fine?

On second thought though - by the same token - just doing the 1% change daily on a nano means taking out 2 and 1/2 cups and replacing 2 and 1/2 cups.... probably not worth the annoyance of totting gallons of water back and forth to work :) I think I might try it though if the tanks were sitting right next to each other.
 
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