Lots of mechanical. Lots of aeration. K1 in fluid bed and in reactor. 2 DIY bio ball trickle towers with matrix media as well. Phosban 150 reactor with carbon pellets. 36 watt turbo twist uv on timer 12/12. All running on two marineland utility pumps 1200 gal/hr each.
Ya discus didn't work out for long on my end either. I had tons of hide outs and they started getting topped so i removed them all. Even my 14" flag tail gets topped by my 17" female Henlei. She never succeeds at keeping him down. Its like a wrestling match. Lol.
Not an asian arow owner as of yet. I do have a large silver and a jardini. Im a stingray guy but am growing more and more fond of asian arows. I foresee getting one soon. Looking forward to scanning through the threads to learn more about these beautiful creatures. Cheers.. :)