Is this lava rock good for succulents?

Yes. The porous pieces improve drainage and airflow in a gritty mix. Use it as part of the mix, not as the whole potting medium.

How much rock is in the bag?

The listing gives conflicting figures, so treat the amount as small. It suits a few small pots or a top dressing, not a large repotting job.

You can, but a drainage layer is often unnecessary in a pot with a drainage hole. Mixing the rock through the soil helps more.

Rinse it to wash off dust and fine grit. Let it dry before mixing it into soil or placing it on top.

Lava rock is heavier and does not float, but it holds less water than pumice. Perlite is lighter and cheaper but crushes and floats.

At Balux Pet Market, for $15.71, 74% under what the other stores charge, as of our latest check.

4 stores we checked sell it, including Balux Pet Market, Lowe's, eBay, Amazon.

$15.71at Balux Pet MarketChecked 2 h ago

74% under what the other stores charge

Compared across 4 stores. Prices are checked against each store and labelled with when.

It checks today's price at every store, compares the alternatives and answers in about a minute.