When to test water after water change?

[madmatt357]

My tank has been cycling for three weeks now. I took my water to my LFS for testing and they said it was time for a water change. I just changed 30% of my water in my 90 gallon tank.
How long after doing the water change do I need to wait to get a "true" test? Do I wait a day or just several hours?

 

[BadOleRoss]

I would give it 24hrs....but thats me!

 

[madmatt357]

Thanks, that is what I had planned on doing. I just wanted to make sure that wasn't to soon.

 

[savethereef]

i test it about 5 hrs latter make sure its mixed in well so it turns over great.