Ok so i bought a test kit. PH is at 7.5 Nitrites came back as 0 mg/l, and Ammonia came back to < .3 mg/l. The tank was cycled for 4 weeks. I moved recently and I reused the old gravel.
I had added 10 neons and 3 clown loaches. I kept them for 2 weeks and they were healthy and their color was improving. At the end of the two weeks with the fish doing well I added 10 more noens. The tank itself is a 55 gallon planted. The filter is a Magnum HOT.
Once the new neons were added they did well for about 5 days then I noticed them start to die off. I did a 20% water change but the die off continued.
One thing that I did try and it seems to have stopped the die off was I removed the CO2 defuser. I'm not sure if the yeast from the defuser was causing some kind of growth or bad chemical. One of the neons that I thought would probably die over night, due to his behavior, is actually showing some improvements. I don't know if that was the problem or not but the die off has stopped...just wish I knew definitively what caused it before I go to add more fish.
Thanks for your help and I know I deserve the scolding for not having a $20 test kit..problem solved.
Also, thanks Oddball temp has been bumped to 82.