If you have no seeded media or old filters, Tetra Safestart has always worked for me.
No offence meant, old water is just that, old water. The bacteria involved with cycling a tank live on a surface, not in the water. this why we use porous bio media. more surface area to cultivate them. again not meaning to offend or call any one out, just a FYI that old fish water not do anything.
Filter media from another tank and some water. I also wait about two weeks before wc. Never had ammonia and it didn't cycle.
haha this being lazy? 2 months, sheesh.to start from scratch I am lazy, bagged raw shelled jumbo shrimp, turn the filters on and walk away. change 50 percent water once a week, by 6 weeks everything is starting to click by week 8 time to remove the shrimp change the water and add fish.