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03/08/2007, 11:08 AM
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#1 |
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Registered Member
Join Date: Sep 2004
Posts: 155
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nitrate math - 90G fowlr has at least 100ppm
if i change 20g every 7 days will i be able to get them down ?
or will they build back up during the 6 off days , and i'll get nowhere ? |
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03/08/2007, 11:16 AM
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#2 |
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Bogus Information Expert
 
Join Date: Oct 2000
Location: SW Ohio
Posts: 16,147
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The question here is how long did it take them to reach 100 ppm? If everything was OK and they suddenly rose it could be a major problem like a malfunctioning DSB or a death of something in the tank.
If the increase was gradual then I suggest doing five 25% water changes, doing the change every five days. That should lower them significantly.
__________________
"Leading the information hungry reefer down the road to starvation" Tom Current Tank Info: 130 Now out of service and a 29 |
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03/08/2007, 11:20 AM
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#3 |
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Registered Member
Join Date: Sep 2004
Posts: 155
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tank is up 1 yr - slowly building up to this level - to be honest - i haven't done any water changes - only top offs
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03/08/2007, 12:26 PM
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#4 |
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Moved On
Join Date: Apr 2006
Location: Garden Grove
Posts: 3,627
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03/08/2007, 12:31 PM
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#5 |
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Registered Member
Join Date: Sep 2004
Posts: 155
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thx 4 the link , pls explain the top row ?
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03/08/2007, 12:39 PM
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#6 |
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Moved On
Join Date: Apr 2006
Location: Garden Grove
Posts: 3,627
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top row???
if you mean PG NPG RNPG i dont know what they mean...personally i just worry about Non-Pure gallons |
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03/08/2007, 12:46 PM
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#7 |
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Registered Member
Join Date: Sep 2004
Posts: 155
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ohh - i have it now - it tells you how long it will take until you replace the old and bad water with new and good water -
for example - changing 20g in a 90 takes 16 weeks changing 40g in the sasme 90g takes just 8 weeks |
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