What stage of the cycling

[geko21]

Hi,

I have not posted here, but I have read a lot. I am in the middle of cycling with fish a 400l planted tank, and I have never managed to find information on the various stages of the cycling process and the associated clues, only general information. I know that when Nitrites ans Ammonia go to zero the cycle is completed, but I am trying to determine how close I am to this point.
Currently I am on the 12th day, with two big canister filters and a lot of fish and my Ammonia is 0.5 mg/l my NitrItes are somewhere between 0 and 0.5 mg/l and my NitrAtes are 15 mg/l. I have not observed any spikes, but I do frequent 20% water changes. Can anyone judge anything frome these numbers? Ph is 7.5
I am trying to figure it out because I am currently underfeeding the fish (every 3-rd day or so and only a little) and I would not like to keep them so hungry longer than necessary.

Thanks

 

[geko21]

I also forgot to add that I am using Sera Bio Nitrivec a little every day, but the measurements are not made soon after application. The above values have been fairly constant these last 3-4 days.

 

[Allan01230]

ld say you are about half way through cycling. Your'e fish wil not starve feeding the way you do. If any thing it is probally doing them a favor. A tank generally takes about a month to cycle, quicker if you placed seeded filter media in the tank.

 

[geko21]

No seeded media regretfully. So, I gather, there is no real way to judge the stage of the cycle by the water parameters alone?