When to do water change on a cycling tank?

[austinsdad]

The ammonia has been off the chart for about 4 days now. Cycling with dead/live rock - good looking porous stuff, but no life. That's the usual from my LFS. Big tank, cured and uncured rock, with high ammonia.

On mine now, there is a CPR bakbak running, heater @ about 76 degrees, with a PH running in a 40g breeder.

Anyway, should I begin changing water now? What % and how often (or w/certain indicators).

Don't want to delay the cycle, but want to do what's recommended on the changes

 

[RMPD109]

If there is no life on the rock than just wait it out and do a good change after ammonia and nitrites hit zero. This change will reduce accumulated nitrates. I recommend 25% but others say up to 50%.

 

[sango]

Wait untill the cycle is done then do the water change

 

[austinsdad]

Thanks guys!

 

[sango]

Wait untill the cycle is done then do the water change

 

[austinsdad]

Thank you Sango and Sango.

 

[sango]

Wait untill the cycle is done then do the water change

 

[steve-s]

Wait untill the cycle is done then do the water change

I think he got it after the first, second and especially the third time

Please don't spam the board 8)

Cheers
Steve