houndour said:
ok? will the other plants die? and do the fish mind? I've read about blackouts...so just have a couple of qs
Do I stop dosing? and stop CO2? And do I just stop these things and completely black out with binliners? Some of my fish are sick at the mo. Should I wait till they are better or...pass away
cos I wont be able to monitor them if I have a black out.
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hmm forgot about that you better wait, it has to be total blackout, no peeping
Best thing to do is go ahead and get the co2 tomorrow if you can, and you might want to play around with that anyway and get it set up and running, just to have it ready for when the blackout is over, during the blackout your plants will be fine and your fish, you will turn off the co2, and when its over you will do a water change and turn it back on again, so you may as well be ready.
Basically for the blackout you will do a 50% water change, you will remove as much of the bga as you can by hand, you will trim any badly affected plants, you will clean your filter, turn off your co2, and then you will add 10ppm of NO3 to the tank, this is the important bit you add 10ppm of NO3, not 1 or 2ppm to bring your test kit reading up to 10ppm, you add 10ppm, and then you will wrap the tank completely blacking it out for the 3 days, use whatever you can, binliners or anything that is going to be totally light proof.
After the 3 days you will do another 50% water change and dose 10ppm of NO3 back in again and your other normal ferts and switch back on the co2.
To get bga in the first place your NO3 levels must have bottomed out at some stage, this is what triggers it, bga is apperantly present in every tank but low nitrate levels will trigger it, apperantly it is airborne and is present in all our tanks whether we like it or not, but will only show when nitrate levels are very low or have bottomed out.
So to ensure it doesnt reoccur you must make sure that your NO3 levels are allways good or it may come back.
iggy01 may have more info on this if he reads this, he is very good at algae control, but basically the above is how you do it.
So its really up to you when you want to do it, obviously soon, but not with sick fish, so you will probably have to wait until you can treat them.