How much water to transfer

[Peanut_Power]

I changed from a 75 to a 150 and I put in fresh dechlorinated water, switched my old cannister over and put a bag of the old rock substrate in the wet/dry. I got my water temp to match the old and threw the fish in. Been a month now and all survived.

Main reason you use the old tank water is cuz the bb are already acclimated to that temperature. Using new water imposes the risk of shocking your bb because it may be a different temperature among other things.

If you do use new water, make sure its as close to the same temp. as the original water.

 

[Dixon81]

I agree. A couple of months ago, we ended up having to move all of our tanks around in order to fit more tanks in the house. On the smaller tank (a 75), we saved the water, because the water heater had run out of hot water, and we needed to transfer the fish immediately. However, on the 180 and 125, we added all new water. All three tanks are fine. If your filter is going to off for a while, it's a good idea to move media into a shallow pan with tank water so that oxygenation can still take place. There's no need to save the water -- put that energy into ensuring the bacteria in your filters doesn't die.

The media will stay inside the eheim w/d that i will leave full of water and ill keep my sump full of water. I can float the biowheels in the tubs where the fish will be. The change should only take and hr or so.....hopefully. Its funny i never had to thnk about this before but i have been awake all night thinking about how i am going to do this most efficient. Is there anything wrong with taking the sand of out the old tank the night before?

 

[Geoey]

it completely depends on how good your new water is , i would play it safe use as much of your old water as you can,

 

[redm18]

I would not save any water. There is no advantage to it and saving water is a pain in the butt.

 

[Geoey]

there is a huge advantage to it , you could risk wiping out all of the bb and end up with a uncycled tank that will take a month of cycling to settle down.

 

[KaiserSousay]

I would not save any water. There is no advantage to it and saving water is a pain in the butt.

there is a huge advantage to it , you could risk wiping out all of the bb and end up with a uncycled tank that will take a month of cycling to settle down.


Don`t think either method bad, save the water or toss it.
Would I go to any extra work to save all the water, no.
But, I never had any bad experiences moving tanks.
Usually we do something, with all good intentions, that causes a bacterial die off.
As long as we monitor the "new" tanks, a move should not be a problem.