I'd be careful. I'm not too experienced with this as all my experience comes from setting up one 2.5 gallon tank.
Just make sure it's in something. I got a little bit of sand just into the tub itself and couldn't get it out. I don't know if it's the shape of my tub but they wouldn't go down the drain. I had to get as much as I could out with a wet paper towel.
My kitchen sink got clogged from washing out the bin I had used to hold the potting soil.
I'm sure you can do it I'd just be careful.
Also take anything I say with a grain of salt because I'm a newbie.
Just make sure it's in something. I got a little bit of sand just into the tub itself and couldn't get it out. I don't know if it's the shape of my tub but they wouldn't go down the drain. I had to get as much as I could out with a wet paper towel.
My kitchen sink got clogged from washing out the bin I had used to hold the potting soil.
I'm sure you can do it I'd just be careful.
Also take anything I say with a grain of salt because I'm a newbie.