I got my filter today, a fluval 3 plus that pumps upto 700l/h, put 10 bunches of val behind the large driftwood, so tank now is near complete, i like the java fern idea of having it tied to the driftwood, all i want now is a nice dense but small corys can fit through and not get stuck, bottom carpet plant that grows very easily and with a low light.how many albino corys would be necesary?, i was thinking 3-5.