PetCo in Woburn sells damsels the cheapest, $4 a pop, so i grab 5 and toss them in. The smart ones last a couple days, the lesser intelligent ones go right away. 10-15 ppm for a Nitrate level is not high... its just a pain. My Nitrates are over 100. I know its due to my poor choice in using CC as a substrate, but at this point to change it all out would require finding someone to babysit my fish for a week or so. My guys are big, and it would need a tank at least 100 gallons or more. I don't know what to do. The high Nitrates already caused a big ich breakout. I have almost gotten past that now, and i am consistently siphoning the bottom to remoe any crap in there. I think i am slowly gaining on the issue and the Nitrate level is down to about 120. I know, its pretty bad. And it all happened in about the course of two weeks it just all crashed. I feel a bit better now knowing that the Lionfish is eating, that was my biggest concern with this whole thing. But force feeding is obviously always a last resort.