pearling

[hani]

HI, i have noticed that my plants are not pearling as much as they used to, am at 3.5 w/g, co2 presurized, EI
plants still growing, is this normal after the tank is 4-5 month old?
thanks

 

[VaughnH]

If you are using a drop checker you have a good chance to be able to know how much CO2 you have dissolved into the water. Otherwise, not.

Then there is the water circulation issue. After the plants grow for a few months we typically have a tank nearly filled with plant matter, and the water has a much harder time circulating around all areas of the tank, so some areas can be very short of CO2, thus no pearling.

 

[essabee]

All other things, including the CO2 ppm, being the same, I would suspect the the light bulbs are now giving way. Not the intensity they had, nor the spectrum they innitially were.