100 % Water change?
 

Hi guys,

I am going to be switching to RO/DI soon. I wanted to move everthing to my QT and do a 100% water change is that ok or am I going to cause a spike? I have done a 60% before but never thet much.

Thanks,

Eric

I wouldn't. Can't think of a good reason to do it at this point. Do a 50% and you'll be fine.

I agree, you want to keep some of your "mature" water.

I would do 20%-25% for 6-8 weeks then cut it back to the normal 10-15% per week.

I agree. If you did 100% you are going to kill alot of good bacteria. And i dont think you want that.

The only reason I think it should not be done is that you will have to acclimatize ALL of your livestock to the new water's parameters. If you have the time and extra water to acclimate your livestock, I'd say go for it.

Just to let you know this is a fish only tank with nothing in it right now, but by the time I get my RO up and running there will be at least two fish in it.

No to sure if this makes a difference.

Thanks,

Eric

It does make a difference, just go ahead and do the 100% water change then if this is not an established system.

Wait until you get the RO running, make the 100% water switch, then add the fish. That's the way I'd do it, anyway.

Yeppers.

I have done 4 or 5 100% changes now (when I moved the tank or tore it down.) if you match your new water to your old waters peramiters then they shouldn't be any problem.. but if all you are doing is switching to RO water and that is the only reason why put your self through all that work.. do a 50% every week for a couple months (sounds like more work to me actualy :neutral: ) ya go with the 100% and match the Alk, PH, salinity and temp to your old water and go for it.

Steve