Hi all

Bought an Ecco Pro 2034 this afternoon, came complete with one tray of Eheim MechPro (the black spiral plastics) and a large bag of SubstratPro.

My question is, once I've filled about as much SubstratPro as I can into the top tray, I still have a good amount of it left over.

Am I supposed to fill up any available space with the SubstratPro?

FYI I migrated about 300g of BioHome into the Ecco. But the volume of leftover SubstratPro seems more than 300g or 0.3l to me.

Cheers