10-29-2006, 02:30 PM
Join Date: Mar 2004
Location: Dayton, Ohio
iTrader Positive Rating: 100%
The melting of the Crypts can happen anytime you move from different water parameters such as the LFS to your tank. With your light levels, you definately need to address both CO2 and nutrients, mainly NO3 and PO4. The plants may soon stop growing and when they do you will probably begin to see algae growth.
I run the same amount of light on one of my 75g tanks, but I use less intense T-8 tubes. Your CF bulbs should put out more light than my T-8s. Anytime I slack off on the ferts or have a CO2 issue, algae hits hard and fast! How many DIY CO2 bottles do you have on your 75G?