I know what Iwagumi is, I need to buy some ASA for my 29 Gallon,
and ADA sells buy the liter, and since the stuff is so expensive,
I don't want to accidentally buy too much... forget that I said it was Iwagumi
How many liters of ASA do I need for a thick enough substrate to have some
sort of slop from around 11-8cm in the back to 4cm in the front in a 29 gallon?