Hello. I currently maintain a 29 gallon tank with a Crenicichla regani, three Centromochlus musaica, a Laetacara fulvipinnis, some medium-sized tetras, some snails, and 3 fancy plecos. I overfilter the tank and do water changes once a week, so I think I can handle an increased bioload in there. Are there any cool mini-monsters from South America for that tank size? I was looking into bumblebee catfish but I honestly think long-term they wouldn't work out. I really love Thalassophryne amazonica but I think it would eat all my tetras.