I was out of town over the weekend and we had a 3 day power outage. The power was restored prior to coming back home and everything was back up and running. I immediately checked the water, and the ammonia had spiked to almost 4 using the API test (Just a little lighter than the 4 reading). I immediately changed about 35% of the water and followed with a 25% later in the day and another 35% the next day (yesterday). Everyone still seems fine except I lost one nerite and another is acting fairly bad (falls a lot and only moves a little). My ammonia is still at 1, but I am accumulated Nitrates. It is a 13 Gallon with 5 Danios, 1 Guppy, 6 Nerites and 7-9 Yellow Neo Shrimp. Should I add some Tetra Safe Start, do daily water changes and keep monitoring until cycle completes again, or is there something else to try? The tank has only completed cycling for a 2-3 weeks, so I think the bacteria was probably still pretty weak. Any help would be appreciated.