Hi i have recently taken over my sons fish tank who lost interest in it .the tank has been running for about 2 years i have tested the water all good nitrites 0 temp 26 c. I have checked size with volume calcaltor it is 33 gallons 80cm long 35 cm wide 45 cm deep..I would like to add more fish after some research i can confirm ive got 6 black neon tetra 1 cherry barb and 1 dwarf gourami. So i was wondering if i could add some more fish and how many with out overstocking and which fish would be ok with my current fish . I did see some rams at local fish shop which i liked and also i would some type of alge eaters]as tank and gravel was covered in green alge i have cleaned now.I also plan to replace the plastic plants with real ones is it best to replace plants before getting more fish ?.