newbie here with a suggestion.
expect die-offs (dirt) from the LR during curing period. My suggestion (gurus, please correct me if this is wrong) is to not put sand yet during this period. The sandbed surface will be covered with die-offs, giving the hassle of cleaning sand. And, if sand needs to be cured, you may separately do this.
see pic below:
this is what i have right now
at hindi ko alam kung pano lilinisin to..