nitrate math - 90g fowlr has at least 100 ppm

[3bavboys]

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 ?

 

[saltn00b]

depends where the trates are coming from. care to give some more info?

 

[3bavboys]

they been slowly biulding during the yr the tank is up -
i havent done water changes - only top-offs

 

[saltn00b]

ohh ouch. ok then you are in good shape. or will be. start with a 40% change, then every week do 20-30%, you should be good in a few weeks.

 

[3bavboys]

ok - so my 20g sked wont really help ?

 

[saltn00b]

thats ok, but you should do 40 g the first time.

 

[3bavboys]

k , ty