2012-4-19

Blue diamond is getting thin and will not eat.  Certainly going to die.  The anitibiotic did not help.  Everyone else looks OK.
Grass looks a little pale.  Added iron yesterday but iron does not stay in water column long.  Need to replace the gravel.
Fe 0
KH 60
pH6.9, plan to lower it to about 6.7.
Nitrate, nitrite, ammonia looks like 0.

2012-4-16

Removed antibiotic. Charcoal to filter.  35% water change.

Blue diamond has not eaten in a week.  He's not going to make it.  The rest look OK.  Have been nursing blue diamond since Jan.  No solutions left.  Afraid of jeopardizing the others..