some8

Thanks for all the replies. So do you reckon if I introduce a live plant back in the tank, it would solve the green water problem? I change water twice a week by the way. So I don't think fish waste is the cause. I didn't have this problem before having live plants. That's good because I'm only planning to have couple of blackmoors in 100L tank. Even I feel my 28L tank is too small for him right now. And yup I do have gravel of course. that's good point actualy. I might think of adding more gravel to it. Atm the gravel is layered around 2inch thick. I will forget about replacing filter system then. I will just stick with current UG filter and get a new filter system as I replace the tank later. Cheers.

Hi all. I'm new to this forum. This is excellent space to get information. I recently started this hobby. I got a kit and fish as a gift. It's Aqua one tank kit, which consists of 28L glass tank with hood + light and UG filter with 400L/H powerhead. Flow rate is unadjustable. I have one blackmoor atm and planning to get some more as I expend the size of tank. I'm thinking of acquiring around 80L~100L tank when I move to bigger house.. I'v had this setup about 5weeks now. It seems my fish is happy and quite active. I had no problem with it except going through Algae bloom.(green water) Quite strange as it is no where near the window and well out of direct sunlight. I turn the light off overnight and I have no live plants atm. I think it's got to do with live plants I had before though. I had about 3 little ones before and replaced them with plastic ones as live ones just died. Anyway the main question, is the filter. I got UG filter that came with the tank. It's got plastic frame goes under the gravel and powerhead pumping water through it and pour it from the surface. I think the green water problem is partly because I have no sponge on my filtering system?? Also isn't a pump of 400L/H is bit too much for my tank? I think it creats bit too much current. For these reasons, I've been thinking of change my filtering system from UG filter to canister filter or internal filter. I've looked at Eheim 2010 or Aqua one CF500. I'm uncertain these are suitable filter systems for my tank. I'd like an adjustable flow rate, since when I upgrade to bigger tank later on, I would want to use the existing one rather than buying new. What would be your opinion on this? Cheers and this forum rocks.