How Much Water To Change Before Adding Fish?

[Lizi_angelfish]

Hoping to add some fish tomorrow but can't seem to find where on the forum it says what percentage to change? Nitrates are 80ppm. Thanks

 

[Boromir]

Im in the exact spot you are and asked the same question. I was told for the first water change after a cycle is most or all of water and it must be right because before I asked I did a 50/60% water change and before and after it the Nitrates were the same at 80ppm.

 

[fluttermoth]

I'd drain the tank right down to the substrate, personally. You might as well start off with totally new water.

 

[brian1]

I have just read that fish can stand 100ppm, so if you did a 50% water change on Friday and the same on Monday, that would not be as stressful......just my thought's

 

[fluttermoth]

^ true, but as the OP doesn't have fish yet, she (sorry for referring to as 'she', OP!) might as well do a really big water change now.

 

[brian1]

In that case I would FM......I thought fish were in sorry

 

[Lizi_angelfish]

Thanks for the replies! Did about 90%. Added a mossball too! Can you split them up? Is the idea that they can root onto bogwood etc? Sorry for the change of topic!