Hello to all, my name is Brian, i live in Tenerife (Canary Islands). I´ve been in the marine-reef hobby for nearly 10 years. And now im gonna jump to "sweet" waters

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I have a 157 UK gallons tank with an overflow built in the tank. Tank dimensions are 170 cm long 70 cm width and 60 cm tall = 714 liters of water.
I need your experience and help with this project. This tank will only have one o two pieces of drifwood and no substrat as decoration. I would like a pair of tiger or red oscars with a few tankmates (ej. Ancistrus, pictus catfish and Hero Severum).
I have a 210 liter sump, but im alble to get a Eheim Prof 3 canister filter.
Well i need your help with the tankmates ive mentiond above and how many of each and what do you think about the Eheim Prof 3 canister filter for this tank and fish.
Thanks,
Brian