When I set up my new 7.9, I used 1.5 liters of water from a cycled tank and a half inch of sand from a cycled tank on top 1.5 inches of plant substrate. Will I need to cycle it?
Save yourself the headache and cycle The tank. Small changes in a small tank will affect the livestock more. Don't throw your money away and just wait a few short weeks. Well worth the wait.