Long time no update!!
I guess I'll go in chronological order.
The Cherry Barbs got ich! I turned up the heat, and left it up there for 1 1/2 weeks, they all recovered very well!
then I got 7 Harlequin Rasbora, they spawed after two days of being in my tank! I guess I am/was doing something right. then, yesterday one of them died. she/he (I'm pretty sure it was a she) had been acting kinda funny for the past few days, hanging about in the plants near the bottom of the tank. When I found it it's guts and tail fin had been eaten/sucked up by the filter. (I found it stuck to the intake) I have NO CLUE what happened! Any suggestions about what I should do? I checked the water parameters, they were fine! (0 ppm ammonia and NI, and around 2 ppm NA)
I'm planning (provided there are no more deaths) to replace the rasbora and get the corries in about a week (the 12th).
Here's an updated pic of the tank!