I believe sudden ammonia spikes have been attributed to cause certain types of algae. Usually, I just do a 50% daily water changes for the first week, then 50% once a week from there on out. It really depends on what the water tests at, how much aquasoil was used, water volume, etc... For the co2, I believe you should run something like 7-8 bps for the first week, then slowly decrease that number over a few weeks until your drop checker is a nice lime green. Don't worry so much about the cycle, after DSM, your main focus should be converting the plants over to submersed growth with minimal die off. The cycle is your second priority.