So many people believe this LFS inspired myth that good clean up
Crews will take care of your sand and rock.
The fact is while they help, they also usually add nutrients to the water as food
Becomes less or items are killed for their shells.
You sound like you already have enough.
Keeping and exchanging great water in terms of consistent parameters and a low nutrients environment will not allow algae to grow and your tank will satay clean
For sand, Naurssis snails are best