Post pictures of your beloved aquaria here. Also good for pictures of your fish rooms or equipment discussions. If you are posting pictures of identified catfish, please do so in the appropriate husbandry and reproduction forum above.
At first I would get rid of the common pleco, your tank is way too small for it. Then get more Cories (of the same species), 4 isn't really a group. For a pleco that eats algae/wafers I'd go for a bristlenose Ancistrus cf_cirrhosus. They won't bust your tank, are easy to keep, available and come in different colour morphs. If you like it colourful go for the albino, the "fake" L144 or the super red variety.