That's my best guess. Whatever it is, it's killing the older leaves on my wisteria. Not sure of the cause or what to do about it. Any information appreciated. Thanks.
Blech. I have that on some of my flame moss. Fuzz is right.
Does that section of the tank get enough water movement? I just cleaned one of my 2 mini canisters because I realized the flow was almost nil! What is your dosing regimen? lights? CO2?
I think waterflow is good; all plants are swaying back and forth slightly. I dose dry ferts and have: N 15-25, P 0.5-1.0, Fe 1.0, GH 10-12. Light is 55 watt CFx10 hrs over 29 gal., and pressurized C02 with drop checker green to yellow. Eco-Complete substrate, and 10 gal WC every week.
I have made my own 4dkh according to the following formula: 1 smidgen spoonful of baking soda in 3 pints and 1 cup distilled water. Don't have an airstone, but I can adjust the outflow of my cannister filter so as to agitate the surface, although I haven't done so because of co2 concerns. Can easily up my KP04 dosing.