I keep and am very fond of my Columbian/Silver-tip sharks. I've had great success in a BW tank using 1 cup Instant Ocean per 6-7 gallons of water.
I have had soem trouble in getting them and have usually had to request an order from my LFS. They are wonderful to keep, though. The largest I have seen in a tank [not mine] is 18", but I think 12-14 is a more common max. tank size. They grow at the rate of a few inches a year, I think.
I have had soem trouble in getting them and have usually had to request an order from my LFS. They are wonderful to keep, though. The largest I have seen in a tank [not mine] is 18", but I think 12-14 is a more common max. tank size. They grow at the rate of a few inches a year, I think.