Don’t be fooled @ChrisD80 that sand was freshly in the day before that photo.Hi [mention]Geoffrey Rea [/mention] could I ask a question about your beautiful sand and how you keep it so pristine?
You will notice the sand is only a cosmetic layer 2mm deep though so is easy/economical to replace using a small amount. Maybe something to think about for the future.
However, between monthly changes just keep it simple. If you have some tubing, just siphon into a bucket slowly and wiggle the tubing above the sand to kick up dirt without siphoning the sand. This keeps the tank looking clean throughout the month.
When keeping Corydoras with a deeper sand bed they’ve done a good job of turning the sand over and keeping it cleaner too.