Originally Posted by tapscrew
I have a 25l nano and everything is covered with blue green algae, i have been dosing with AlgaeExit but the beast remains, will an overdose of flourish excel kill it or is there any other way to get rid of it.
There is an 11watt light on for 3 hours in the morning and 5 hours in the evening, it gets a fair amount of sun during the day.
I havent been dosing with ferts or co2 as the tank has only been running 2 months and the substrate is flora base. Help me fix the prob, the tank looks horrible!!!!
First of all, try to keep the sun out of your tank, this only accelerates everything.
Second, if you've access to a testkit for NO3 and PO4, maybe you can give us your values. You're probably out of nitrates or have high phosphate. This imbalance between NO3 and PO4 can be cause by the fact that you haven't cleaned your filter for a while (no offense) or maybe because the uptake was very high because of the extra sun on your tank. If you didn't cleaned your filter for a while, start with that.
Maybe you can give us you NO3 and PO4 values. For now, you can start by vacuuming most of it away, do a 50% water change and two days later again (again vacuuming most of it away). Also clean your filter (never too clean!) and if you can measure you NO3 and it is low, maybe you can add KNO3.