148.6L (39.2 gallon) aquarium journal

[elephantnose3334]

You are better off doing a big water change and then adding the fertiliser. If you add fertiliser today and do a water change tomorrow, you get rid of a lot of the fertiliser you put in today. So add the fertiliser after you have done the water change.

I used to do water changes and when I had finished and packed up the hoses, I went around and fertilised each tank.

Good thinking. I might do that in the future, but I do have a schedule for fertilisation (Mon, Wed, Sat), but I might change Saturday into a Sunday.

 

[Colin_T]

You can put the fertiliser in straight after you do the water change. That way you won't have to change your fertilising routine. Just do the water change and add the fertiliser straight after that.