New 265 gallon tank situation

[Castlk]

This has worked well for me in past situations like this;
-catch fish and put in bins/holding tank.
-drain half the water into storage containers (stirring up the gravel is going to make it nasty!) or pump it directly into the new tank.
-transfer gravel etc over to the new tank, leaving behind as much muck as you can.
-add old tank water to new tank
-dump fish in [only reason I keep the old water is to save acclimatising them]
-top up with pre-heated water to avoid too much of a drop in temp
-hook up filters etc.

You don't really need to transfer the water over, as someone said all the beneficial bacteria is in your filters, but it does save time on acclimatising them. I shifted house with three tanks running and did a bit of a relay using this method. I had a new 210g waiting at the new house, caught fish from my 160g, transferred fish, media for the sump and about 80g of water over to kick-start the 210g. Then moved the empty 160g to the new place, then repeated the process with the fish and filters from my 80g. Then moved the 80g and repeated again with the fish/filters etc from my 40g. It was a hell of a day but it went off perfectly and the fish were happy and eating the following day.

+1.

 

[PDRed302]

If you are setting the tank up in different locations, here's my process;
1. Setup new tank, fill, & treat
2. Move filters, decor, etc
3. Move fish
4. Shut down old tank

If you have to swap the tanks out in the same location, you''l have to use bags, totes, or something to hold the fish as posted above.

X2

No need to move water, just make sure to keep your bio media wet and aerated during the move.

 

[Inglorious]

This has worked well for me in past situations like this;
-catch fish and put in bins/holding tank.
-drain half the water into storage containers (stirring up the gravel is going to make it nasty!) or pump it directly into the new tank.
-transfer gravel etc over to the new tank, leaving behind as much muck as you can.
-add old tank water to new tank
-dump fish in [only reason I keep the old water is to save acclimatising them]
-top up with pre-heated water to avoid too much of a drop in temp
-hook up filters etc.

You don't really need to transfer the water over, as someone said all the beneficial bacteria is in your filters, but it does save time on acclimatising them. I shifted house with three tanks running and did a bit of a relay using this method. I had a new 210g waiting at the new house, caught fish from my 160g, transferred fish, media for the sump and about 80g of water over to kick-start the 210g. Then moved the empty 160g to the new place, then repeated the process with the fish and filters from my 80g. Then moved the 80g and repeated again with the fish/filters etc from my 40g. It was a hell of a day but it went off perfectly and the fish were happy and eating the following day.

This is how I've always done it as well. I move over some of the water to make the acclimation easier on them. Once 50-75% of the old water is in the new tank I move the fish, add dechlor, and then fill'er up. That way it's more like doing a large WC and not as stressful of a move.

 

[reoysh2]

Update on this situation, Transferred everything cleanly, converted to sand substrate with a little gravel mixed in and the tank is running great and looks great! Heres a few pictures

And a picture of my brand new EBJD that I felt like throwing in cause I'm so hyped to get such an awesome fish

 

[jiant2520]

All looks great... glad your trying to "hide" that Dolphins logo too, lol.