ok I've lost 8 neons in the past 3 days and not sure why. my mom bought me some harlquine rasboras and some guppies from petco and my neos started dying. I've had these neons for about a year now and they have survived my tank cycling but now I put in new fish and they die. Now when they die it's real sudden and no signs of ick or anything. they stay brilliantly colored and just start darting around and going nuts till they just stop. I've checked my ph and my nitrits amonia and everything. nothing is out of the ordinary. if u have any ideas what it might be I would like to know and i'd like to know if my other fish are at risk. cause I realy don't wanna loose my dojo loaches. thanks for any advice.