Thanks for all the comments.
Let me answer some of the things brought up here.
1) Air circulation: That is a big issue. In my "ghetto" setup...the air was always fresh. NOTE: I only used te humidifier during summer and it was sufficient to keep temps lower than 80F during the day. Hence my plants never suffered last summer and loved the whole year of growth. 2008-2009 was the best growing season ever. EVERY single nep I got thrived. The air was constantly circulating from outside to inside and then out through a chimmney at the top. In the tanks that is the biggest issue. Its full of stale air. You cannot see it, but now, I have added fans at the top of the tank. One is pushing air in and another pulling air out. But being small PC fans, I know these aren't too powerful. But atleast there is some air refreshment. So, I am hoping things will change.
Ideally, I need the air to be FED in at the bottom and to leave the tank at the top. But being a sealed GLASS tank that cost 1000$ to buy and obtain, I don't want to risk making holes.
So yes!! AIR CIRCULATION IS ISSUE #1.
2) Heat: On the contrary to what you think, the meters read that the temps are pretty decent. Only during summer...they went overboard. But during autumn right now, temps are moderate...75F day and 60F at night. Perfect for most highlanders. SUmmer....since around march..temps have been 80-93F day ...but average of 85F and nearly 70F at night. I did use an airconditioner and occassionally drop temps at night to 50F. But I am sure this stressed the plants even more as ACs drop the temp suddenly. I get a feeling that these plants need a slow drop. No quick changes. Even if it is nighttime temps.
ALso note that these temps are taken at the pot level. The wires u see are probes for a temperature/humidity monitor. I know the temps get higher at the top of the tank. I can clearly feel the air warmer than the air at the bottom. But with two light fixtures (the 4' x 4 T5 and 2x 4' T8), there is no more room on top of the tank to have outlets.
3) Misters: The whole reason for buying the mistking system was for the SPHAGNUM. I have learnt through experience that if the sphagnum thrives...the plants will thrive. THe misters come on once every 2h for 45 sec (daytime only) to wet the plants. Clearly the broms in the first tank like it. But sphagnum still isn't taking off.
All I know at this point is.... The variables are not in balance. As our good friend Butch (Av8tor1) used to keep telling me.... everything has to be balanced: High light...high air circulation...high humidity....I know I have some variables in optimal level. I just need to optimize the rest. I just don't know which ones are which.
lol!! Btw...thanks for the nice comments guys about te plants being ok. But what I noticed is that the first time since I got them...the lowii, villosa, jacuqelineae, jamban, burbidgeae, truncata, argentii, hamata, macrophylla and rajah (those are all species in there. THere are some duplicates like of villosa, truncata etc. But I have lost some as well.) have all stopped growing and are showing signs of heat damage (red speckles on leaves...aborted pitchers).
Let me finish with another of my fav pics.
Can't see it clearly in this pic size...but you can actually notice each "rain drop". Love my D90.