How fast to re-cycle tank?

[epond83]

So my turtle made a huge mess in her tank when she ate an egg that she laid, anyway had to do a 100% water change and forgot to add declhorinator. Woke up the next morning and realized i had forgoten and added it. That evening I put bio media from an AC 50 on another tank (which i just sold all the fish from) it the turtle's filter to help re-seed the damage i had done. Next morning the tank has a milky white haze which i know is the bacteria population growing so i'm on the right track.

I was wondering about how long until it would be fully cycled again. This tank has been up and running fully cycled for about 2 years now.

Also I was wondering if anyone had an idea on what a safe level was that the ammoina could get up to durring this time. I know it should always be zero and it usually is, I just want to know at what level I should do a water change.

This is on a filled 75 gal. with a fulval 404. Only the turtle is in there.

So i posted this is the wrong place but can't figure out how to delete it and repost in the right place.

 

[knifegill]

I usually do a big change if it hits anything higher than barely visible. So between .25 and .50 on the card is definitely a good time for a water change in a cycling tank with inhabitants. It is also good to test it twice a day so you can tell when it is rising more slowly.

So, say on day 1 8am test = .25, 8pm test = .50, waterchange, feed
Day 2 8am test= .25, 8pm test= .30+/-, waterchange, feed
Day 3 8am test= .25, 8pm test= .25, back off, don't change or feed, and check it again in the morning. It's usually dropping fast by then and you can start watching nitrates.

Once I get the same reading twice in the same day I back off on water changes and the cycle plows ahead. Since you've got a culture already in there, you probably won't see nitrItes, at least I never do when getting a Q tank up. Just ammonia and then a jump to nitrAtes.