Background. I bought this tanks end of December. Saved most of the water but thinking it got too cold and killed bacteria. 125 gallon tank. So made water to finish fill up. Came with fish and anems. Black widow nems looked great when I got tank. Now they are bleached. My nitrite level was very high. I did a 40% water change and levels look good now. Diatoms formed and was ugly but now almost all gone. Looks like it had to cycle again. Trying to save anems by feeding raw shrimp when I get home from work. What else can I do? They are doing better than last week I think.