Hi, move not gone too badly. All transferred. Took a lot longer than planned for no casualties yet. I know I probably have about a week of minimal feeding and water changes to stop the risk of ammonia spikes.

I'd just like to trouble you for a little more advice please.

I have small seperate sump and refugium. I was going to T off the drain from the main tank but I'm worried that with an OR3500 return this would mean not enough water getting by the skimmer. I could drain the fuge back to the start of the sump but I don't know what effect skimming fuge water is going to have? The only other option I see is to pump from the sump to the fuge but thats another pump and I would prefer not. Any thoughts?

Now off for a well deserved glass of red.

Cheers