Algae bloom.
I did a huge 120litre water change the other day, tested my nitrates and they were still sitting at about 50ppm. Over it I decided to take some more drastic measures. I’ve read a lot into carbon dosing, basically, if you add something carbon based (such as sugar or vodka), bacteria will feed on it and their number will increase. The bacteria will be consuming more and more nitrate to build their cells and the excess bacteria in turn will be skimmed out by my skimmer, resulting in lowering my nitrate reading.
I decided to try putting one teaspoon of sugar into the tank. The next morning the entire tank was cloudy, this was a good thing as it was most likely an algae bloom and too right my skimmer went nuts and was pulling out more crap than usual. I’ve tested for nitrates again this morning and the reading is looking a little better. Sad thing is I lost my clam. Everything else is doing fine though.
I’m so over this crappy tank. I’m starting to seriously think about doing it right straight off the bat. IE: A custom tank made to my dimensions (I’d like a deeper, not taller tank), a proper weir + sump and plumbing set-up and with some serious tech equipment to boot.