Yes when you are done, you Do a 50% water change and introduce the full fish load at once. and monitor closely
You should wait until nitrogen levels are similar to: 0.0.40, This means cycle is done, 0 ammonia, 0 nitrite, 40 Nitrate. And start immediately you water changes schedule.
We called it the nitrogen index in ppm... If you have fish in the tank, an index of 2.x.x means you are reaching deadly levels of ammonia: Water changes... x.75.x your nitrites are dangerously spiking: Water changes... x.x.40 Your nitrate level is pretty high: Water changes. Your goal is 0.0.<40 I used the maximum in each scale. Poison would be like 3.75.40 But keep in mind that even low level of exposure to nitrite for extended period are still toxic to fishes.
With fishless cyling you can reach all those deadly levels without hurting any fishes. And save a freaking lot of water changes.
You should wait until nitrogen levels are similar to: 0.0.40, This means cycle is done, 0 ammonia, 0 nitrite, 40 Nitrate. And start immediately you water changes schedule.
We called it the nitrogen index in ppm... If you have fish in the tank, an index of 2.x.x means you are reaching deadly levels of ammonia: Water changes... x.75.x your nitrites are dangerously spiking: Water changes... x.x.40 Your nitrate level is pretty high: Water changes. Your goal is 0.0.<40 I used the maximum in each scale. Poison would be like 3.75.40 But keep in mind that even low level of exposure to nitrite for extended period are still toxic to fishes.
With fishless cyling you can reach all those deadly levels without hurting any fishes. And save a freaking lot of water changes.