Originally Posted by Canuck Fins
This is right. In a cycled tank, you don't change the filter media because it's one of the places that is full of good bacteria for the tank. However, it's pretty hard to keep a steady cycle a 2.5G tank. Cycling really works better in 5G and bigger from what I have read.
Is your tank near a window and getting a lot of direct light? That will be a big factor in algae. I had diatoms, but they've really decreased as my tank got older.
Most of my tanks are fairly new setup..Which i believe maybe my diatom issue...
Or the playsand I am using maybe causing it...I never had issues until I switched to that sand...I plan on switching my 5.5 gallon back to pool filter sand or gravel to see if it helps at all eventually...
The algae itself isn't actually in my 2.5 gallon minibow it is just in the filter and on my sponge baffle...which is making me think it is my lighting? The filter sits really close to the light and is an open top kind of filter..
I have an amazon sword plant and a few stems of anacharis in my minibow.