how to upgrade?

Spartan, Harlok:
This makes complete sense. I am possibly going to be in the situation I just described above and was wondering if it would be better to do a fishless cycle from scratch or just add the 2 platies from the 5g to 38g tank and stock gradually. With that said how is gradually assesed in cases like this? I would like to add a school of some form of corydora catfish to begin with (bronze, panada or leopard subject to availability) and eventually a pair of angelfish. What would be a good stocking strategy? Oh, I am also changing the substrate but I could put some of it in a pot or something to add a bit more seed material if necessary. Sorry to hijack this thread, I hope my follow-up questions are still relevant. Thanks for the input so far.
 
What I would do is use the 5g for a quarantine tank. After you transfer everything to the 38g, keep the 5g going and quarantine your school of new fish in there. You can use a sponge filter for this. After quarantine, add 1/2 the school to the main tank, wait a few days testing your water to be sure there is no spike, then add the other 1/2 of the school to the tank. If you are going to add 2nd school of fish to the 38g, go through the same procedure again.

This is what I did when I upgraded to a 75g and had no problems.

Dorothy
 
chrisinha said:
i want to upgrade my 10 g tank to 20 g. how should i do it? can i transfer the water in one to another? what about the substrate and decor? would it avoid having to go thru another cycle???? thanks in advance!
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I think as long as you keep the substrate and half of the water. it should be good enough.
 
okie!

is it going to be too stressfull for the fish? i dont want them to die!!

the 10 gallon tank has been set up for just 2 months... the reason i want to upgrade it is because i think it is overstocked. should i wait a little to upgrade it or is it ok to do it now??
 
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