She doesn't seem to be growing much in budwis...

No pictures with natural colors, all yellow or sepia, so can't comment on that; no info on feeding strength, so can't comment on that either. What I cant say is that 1.5 to 2 liters (0.4 to 0.5 gallon) is quite a lot of water to give every 24 hours (at least that's what your info says). Your temperature is on the low side, 21°C (70°F) day time temperature, anything below 23°C (73°C) is going to slow down the development of the plant. I think that your problem is a combination of low temperatures and over watering, which is slowing down the plant, which is why it is blooming so slow. Go easier on the water and try to increase the temperature (maybe lowering the exhaust).