Preboil topup?

[aeviaanah]

How should one handle a top up if adding during boil? Should this be preboiled with its own addition of SMB?

 

[stpug]

How should one handle a top up if adding during boil? Should this be preboiled with its own addition of SMB?

If added during the boil, then simply preboiling the topup water for 5min and adding immediately should suffice. Naturally, add as carefully as possible to avoid much air mixing during the process.