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Old 01-22-2005, 08:11 PM   #1
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Question on water circulation in tank

Is there a recommended circulation rate for the water in the tank (gal/per hour, perhaps)? (I don't mean through the filter and sump, I mean current movement within the tank.) Or is turbulence/randomness more/equally important?

How many power heads would be enough, and is it advisable to "lower them" at night?

OT: Right now it's snowing like crazy here in NY -we're under blizzard alert. I guess I'll have plenty of time to continue my research in prep for my first tank.
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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 01-22-2005, 09:28 PM   #2
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Depends on what kinds of animals you have. Some corals like low flow, medium flow or high flow. Depending on the size of your tank two or three ph at opposite ends and top/bottom. I'm not sure if there is a set amount but if you can see your livestock swaying in the current it will probably be enough. The stronger flows also keep cyano from getting a foothold on you.
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Old 01-23-2005, 02:04 AM   #3
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The rule of thumb is to have 10x the size of the tank. For example, if you have a 40G tank, you will want 400GPH. Some prefer more. Some people use wave makers to have better control over the flow. liveaquaria.com has a wavemaker plus Maxijet powerheads for a great price. I use the same flow 24/7 and haven't had any problems. HTH

Mike
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Old 01-23-2005, 07:25 AM   #4
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Quote:
I'm not sure if there is a set amount but if you can see your livestock swaying in the current it will probably be enough.
This line nearly resulted in a heart attack when, due to my failing eyesight, I thought you had written "if you can see your liverock swaying in the current"!!!

Thanks for the info. 8)
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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 01-23-2005, 01:46 PM   #5
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Good luck! Kat
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http://www.aquarank.com/in.php?id=fishfree
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Old 01-23-2005, 01:49 PM   #6
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That would be SOME current. 8O

Mike
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Old 01-23-2005, 08:25 PM   #7
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I have 2 MJ 1200's in my 55 gallon...Seems a little on the high end to me, but everyone seems to love it.
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Old 01-23-2005, 10:13 PM   #8
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I also have 2 mj 1200 on my 55 and also use the naturalwave timer (one ph blows for 20 secs shuts off and the other ph blows for 20 secs) works pretty well for the $$$ spent.
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