Four Day old tank

[Mali]

hi bros/sis, my branch DW have transparant algea on its surface. what is it? is it harmful? but i saw my oto can still suck ard the branch.

my fren says tat my scaping is not good and can be better. he will help me rescape. any comments on my set up? (pic in gallery cos dunno how to attach here lo, file too big,stone on the DW cos it still floats).

my bubble counter enconter leaking this morning. so i on it and let it run. how do i prevent this from happening? thanks all