hi peeps, i recently juz ordered two 6x2.5x2.5 ft (1000 litres,280 gallons) tank side by side together as im rearing arowanas 1 chili red and 1 sapphire gold,both approximately ard 30cm,i got 2 tanks so each one will be kept in seperately to avoid any fights.Both will have a 4ft by 2ft by 2ft sump overflow filter each. the tank will be finished on the 1st july,due to my house stairwell the tank maker company have to do it on-site as the tanks cannot be carried in. juz wondering whether its best to keep only the arowana in the bare tank or should i add in companions for it? i heard its better to keep lesser fishes so the maintenance will be lesser for a bigger tank,as my arowanas will still continue to grow,they will produce more waste and more nitrate and ammonia will build up,so the maintenance will get higher as it grows.maybe once it starts growing bigger the water change will have to increase from 10% once every 2 week to once a week.if i do get tankmates the water change have to be more frequent.like maybe 10% twice a week.and also the feeding.and im going to be quite busy next year as i start schooling so still considering whether i should intro tankmates or just let them stay alone in the tank. any advice anyone? (pics will be provided soon)