how much do you put in a 1 lb Tumbler barrel?

You would add 2 tablespoons per lb. of rock for both Stages 1 and Stage 2 (that is shown). Steps 3 and 4 will require 1 tablespoon per lb. of rock.

Is this good for etching glass? Has anyone tried it on glass?

Yes, it will work for tumbling glass. Using Step 2 will give a matte finish. Tumbler for a couple of days and check if are happy with the finish. You may have to tumble a couple more days to get the effect you like. To get a more clear look, continue with Step 3 grit (500 grit) and then possibly on to Step 4 (aluminum oxide).

Is it 6 table spoons of grit for 3 pouns of rock? The video doesn't show them putting that amount in

Yes. We recommend 2 tbs per lb of rock for steps 1 and 2. 1 tbs per lb of rock for step 3 and then 1.5 tbs per lb of rock for step 4.

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Polly Plastics Rock Tumbler Media Grit Refill, 2 lb Medium 180/220 Silicone Carbide Grit, Stage 2 for Tumbling Stones (2 Pack)

Polly Plastics Rock Tumbler Media Grit Refill, 2 lb Medium 180/220 Silicone Carbide Grit, Stage 2 for Tumbling Stones (2 Pack)

Product ID: 256324926

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Details

Material
Silicone
Item dimensions L x W x H
15.2 x 15.2 x
Brand
Polly Plastics
Item weight
2.1 Pounds
Grit number
220

🔄Compatible with all rotary & vibratory tumblers

⚙️2 lb Medium 180/220 Silicon Carbide Grit

🛡️Durable re-sealable packaging

Description

💎 Elevate your rock tumbling game with pro-grade grit!

MADE IN THE USA - Premium quality with American-sourced materials
BEGINNER FRIENDLY - Clear instructions and satisfaction guaranteed
MESS FREE STORAGE - Thick, re-closable bags keep grit fresh and spill-free
PRECISION STAGE 2 GRIT - Medium 180/220 silicon carbide for flawless smoothing
UNIVERSAL COMPATIBILITY - Works seamlessly with all major rock tumblers

Polly Plastics Rock Tumbler Media Grit Refill offers 2 pounds of medium 180/220 silicon carbide grit, designed as Stage 2 in the tumbling process. Compatible with all rotary and vibratory tumblers, it comes in durable, resealable packaging to prevent spills and preserve quality. Made in the USA with premium materials, this grit is beginner-friendly and backed by a satisfaction guarantee.

Specifications

Product Dimensions	15.24 x 15.24 x 6.35 cm; 952.54 g
Manufacturer recommended age	7 months and up
Item model number	3405246831
Educational Objective(s)	Supporting educational activities related to geology and mineralogy
Batteries Required?	No
Batteries Included?	No
tech_spec_battery_description_toys	No Batteries Required
Material Type(s)	Silicone
Color	Other
ASIN	B07P2N3V53

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