I never use sand so hopefully someone else will respond or ask about it in a new thread. You know it's a personal choice between using liquid carbon,
CO2, or both. You know I use glutaraldehyde, which is the equalivant of Excel but tons cheaper. You can start with liquid carbon and add
CO2 later if you want to ease in. Or you can do some research and start with pressurized
CO2. You have to figure out what's best for you and your tank. Here is the info on the Glut I use...
Glutaraldehyde is a liquid carbon and works the same as Excel, even smells identical to it. I have never had any losses, fish, shrimp, snails and I use a higher than normal dose (which if you read the excel bottle says you can increase dosage slowly in high growth tanks) and I've used it for quite a long time. Used to use Excel but when I got the info on mixing Glut and
RO to get an equalivant dose to Excel I haven't looked back. Glut is 2.6x stronger than Excel so I get this...
Glutaraldehyde Cold Sterilization Solution 14 day 1 Gallon: Amazon.com: Industrial & Scientific and mix this one gallon of Glut to 1-1/2 gallons of
RO water to get 2-1/2 gallons of Glut for $28 dollars. Look up how much Excel would be for 2-1/2 gallons. Dose at 1ml Glut to every 10 gallons of water . It's never melted anything, not even the Corkscrew Val. Also these products, Excel, API
CO2 Booster, and Glut all breakdown in the aquarium in the range of 11 to 24 hours depending on what research you use. That is why you use it daily. Also the solution must be kept in a container that keeps the solutions totally free from light and store in a cool place.