water change help

[Murphy9]

Ok so I'm about to take out 30% of the water in my tank. To put back the water, i run a hose from my facet to my tank. The problem is my water is tap and has chlorine in it. Can i pour the amount of dechlorinator in the tank then fill it up? Also this tank has no fish in it yet..it is in the 3rd week of a fishless cycle.

 

[200 gallon reef]

Without fish in it you can add it during or after. I would suggest during. What type of fish are u looking at getting?

 

[Murphy9]

Without fish in it you can add it during or after. I would suggest during. What type of fish are u looking at getting?

Ok thanks..dwarf cichlids

 

[DavidAl]

I'm a bit extreme when it comes to this. I like to dechlorinate the water before it gets added to the tank. Even if the tank has no fish in it, it still has beneficial bacteria. In a newly set up tank, especially one that is still cycling, I wouldn't want to risk harming the bacteria. I realize diluted chlorine will probably not affect the BB in such a short time, but that's just me.

David

 

[Murphy9]

I'm a bit extreme when it comes to this. I like to dechlorinate the water before it gets added to the tank. Even if the tank has no fish in it, it still has beneficial bacteria. In a newly set up tank, especially one that is still cycling, I wouldn't want to risk harming the bacteria. I realize diluted chlorine will probably not affect the BB in such a short time, but that's just me.

David

Yea that was my main concern, and the reason in asking this question..didn't want to have to start back over on cycling again.

 

[Hholly]

If you dose enough dechlorinator for the whole tank volume and swish it around, I think it's safe. That's how most people do it with a python or other water changer. Plus, your filter isn't running while you do the water change.

 

[Murphy9]

If you dose enough dechlorinator for the whole tank volume and swish it around, I think it's safe. That's how most people do it with a python or other water changer. Plus, your filter isn't running while you do the water change.

Ok, so once i vacuum out the amount of water i want, I'll pour the amount of dechlorinator it recommends in the tank before filling it back up..because yes the pump will be off..their for not circulating through my filter to kill BB..correct?

 

[Hholly]

Yes, the amount to treat the whole tank, not just what you are replacing. Some folks even dose more after they fill up the tank. You can wait a few minutes before turning your filter back on.

 

[Murphy9]

Yes, the amount to treat the whole tank, not just what you are replacing. Some folks even dose more after they fill up the tank. You can wait a few minutes before turning your filter back on.

Awesome..thanks