Tank (80 litre long) has been cycled fishless with filter medium from Aquaponic system and fish food for 4 weeks, not much of a spike I have to admit. Heavily planted. I have goldfish in my Aquaponic system and have only experienced tropical a in childhood. ( I washed the filter sponge with fairy liquid to be good, the fish and my dad did not appreciate it at all So, I put my first 6 Harlequin Tetras in today but I am not sure if squad aquadvisor is accurate enough, it says I have more than enough filter capacity and about 90 % or so filled with this stocking: 6 Harlequin Tetras (already in) 5 Endlers 6 Neon or Kardinal Tetras 2 Dwarf or Pearl Gourami 2 BN Plecos. Any thoughts anyone? Would really appreciate advice!!! I could extend my filter easily and really loved my dad's pleco... Thanks guys!