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Old 03-10-2005, 02:51 PM   #1
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Question about the "Berlin Method" and water chang

I was reading the article on this method of tanking care of your tank (on this site) and I saw that they still recommend you do 25% water changes once a month...isn't this sort of going against the "natural" aspect of the method since the LR is doing most of the work anyways? Also, I was under the impression that you just needed to add new freshwater to make up for evaporation with SW tanks. Am I way off here?
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Old 03-10-2005, 02:59 PM   #2
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Well... the reason you need to do the water changes is because the water will become toxic. In nature there are tides that constantly moves the water from one part of the ocean to another. You do not get this in your tank.

I basically use this method but I do 25% water changes once a week. This is because I have been fighting cyno and can not risk not having the water changes.

Yes, you need to add freshwater to make up for evaporation.
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Old 03-10-2005, 03:12 PM   #3
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The water changes also help to replenish depleted trace elemnts that are needed in the setup. Most freshly mixed SW will have all the elements needed to support the tank without dosing.
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Old 03-10-2005, 03:19 PM   #4
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Quote:
Most freshly mixed SW will have all the elements needed to support the tank without dosing.
I assume these elements are present in the salt mix, since most of us seem to use RO/DI water.

Also, nitrates may not be 100% removed by LR and/or macroalgae, so water changes will be necessary to remove them.
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30 gal standard 55 lbs LR, 60 lb live sand, 10 gal sump/refugium. Urchin skimmer, mag7 pump, 3 x 96W PC combination 10,000K/actinic bulb, 2 blue LED moonlights
SG 1.024, temp 79.5, pH 8.4

Livestock I added:

1 skunk cleaner. 12 hermits: red, scarlet, blue. 15 or so assorted snails. Discosomas, Ricordia, Rhodactis mushroom corals, chaetomorpha (sump), 1 feather duster, Montipora digitata, Montipora capricornis, Montipora hispids. assorted zoos, Xenia, Kenya tree coral, green Sinularia, green star polyps, branching hammer coral, bubble coral, Devil's hand leather. Yellow chromis, purple firefish.

Hitchhikers: the usual suspects :crabs, bristles, urchin, mantis shrimp (now in exile in mantis tank)

List of possible/likely newcomers:

Feather duster. PJ cardinal, Bangghai cardinal, Firefish goby, Clownfish, Neon goby, Yellow watchman goby, Orchid dottyback. Various corals.
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Old 03-10-2005, 03:45 PM   #5
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So is 25% a month the rule of thumb here? Even for larger tanks?
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Old 03-10-2005, 03:56 PM   #6
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I have a 225 FOWLR with 30 gallon sump and 40 gallon refugium. I change out 30 gallons every 2 weeks. So I am at 20 % monthly. Seems to work well for me but all tanks are different so YMMV
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Old 03-10-2005, 04:04 PM   #7
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Wow thats a lot of water to change out! That sounds like a real pain in the butt. Is there an easy way to go about that big of a water change?
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Old 03-10-2005, 04:07 PM   #8
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My 125 has been running for 9-10 months. I've done 3 small (15-20 gallon) water changes in that time. The only time the tank doesn't look it's healthiest is after a water change.

I may never change water again.
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Old 03-10-2005, 08:52 PM   #9
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Old 03-10-2005, 09:03 PM   #10
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I change out 20g every 2w or there abouts so just under 20% every 2w. We have it down to a science. We fill a garbage can with water, salt, power head and heater. Wait 24-48hrs, use said powerhead to move the water out of the tank and into my sink and then use the same power head to move the water out of my garbage can into the tank. Once a month we use a shop vac to clean out the sump while we're changing out water. It takes about 20m, if that.
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