hi guys, been battling a long battle with spirogyra and decided not to use chemicals manually removed a ton of it but still grows back with a vengence... thus i have decided to give the black out method i try... so i covered up my 10 gal shrimp tank with black garbage bag... so its been about a good 10 hours now... no light, no co2, just a water filter running... im a bit concerned that the oxygen levels in the tank might bottom out and the ammonia would spike considering i have about 4 berried PFRS which i wont want to lose... so just wondering if blackouts do work? and for how long should the black out period be? or should i add an airstone to the tank?