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Old 03-28-2012, 09:02 AM   #1
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How often should i do a wc??

Have a 75gal tank with 2-marineland penguin 350 filters(each for up to 70 gal) and 2-200 watt heaters
3-convicts(almost breeding)
3-firemouth
1-jack Dempsey
11-tiger barbs
5-6-mollies(fry as food that survived!!)
All still very small! About an inch(for the jack) to 3(for the firemouth)
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Old 03-28-2012, 09:08 AM   #2
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Your gonna get a lots of different answers for this. I have 125 and do 40%(+) every 2 weeks and my tank seems OK. I'd like to do that same amount every week but life gets busy ya know. I'd say around 30% - 50% weekly just to throw out numbers. Your load is kinda heavy; even tho the fish r small. This depends on feeding and waste of course.
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Old 03-28-2012, 09:12 AM   #3
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I feed once or twice a day ( depending on my mood) usually flake food or small cichlid pelets with the occasional blood worms and brine shrimp
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Old 03-28-2012, 09:14 AM   #4
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I would recommend 50% weekly. You've got some fish with large bioloads. I do 50% on all my tanks, no matter the stock.
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Old 03-28-2012, 10:23 AM   #5
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IMO, the best was is to test daily and when levels reach near toxic levels, do a 50% water change. Your fish will get used to it if it is done on a schedule. Eventually, you will find your
schedule.

On my 55g, with just 8 Mbipia cf Lutea spotbar, every 4 days...

Toxic levels...Ammonia .25, NitrItes .25, and NitrAtes 40...
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Old 03-28-2012, 01:35 PM   #6
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Depending on stock and I would do one or two 35-50% PWC a week. I do at least a 50% once a week on my 125 wether it needs it or not.
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Old 03-28-2012, 02:19 PM   #7
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Thx for all the advise!!
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Old 03-28-2012, 09:14 PM   #8
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Quote:
Originally Posted by LyndaB
I would recommend 50% weekly. You've got some fish with large bioloads. I do 50% on all my tanks, no matter the stock.
I agree.
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Old 03-29-2012, 10:56 AM   #9
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Quote:
Originally Posted by Malawi Freak

I agree.
Me too
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Old 03-29-2012, 11:10 AM   #10
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Because of the bioload, I'd go with 40%.
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