ebb and grow limit?

hi growers! Is there any reason why I wouldn't want to maximize an ebb and grow to it's plant limit? I have 24 plants now and I'm about to go to 48 (the ebb and grow recommended maximum). Is there anything I should be worried about as far as water/nutrient levels?

55 gallons can go only so far... When your setup is in flood mode calculate the amount of water 24 buckets use. Then you will be able to figure what 48 will need... then you will figure the maxium number of buckets you can have that your 55 gallon rez will be able to handle....

The system says it can do a maximum of 48 plants, so from a 'size of the reservoir' perspective I think I'm ok. Some folks have said that if you max it out you are more likely to get some nute burn. I guess I'm looking for a scientific reason why that may or may not be true. Thoughts?