I recently switched my 29 gal long to black sand (imagitarium) and I’ve been cleaning it with a regular siphone, but it’s pretty inefficient. The siphon doesn’t pick up all of the debris and it drains water too fast to get it clean, I’ve tried to stop the flow in order to slow the draining, but...
Oh, I got it tested at a pet store and they told me it was hard and gave me something to put in my filter, I remember seeing bright orange on the test strip, but idk if that was hardness or something else