I've decided to add some Hatchetfish to my aquarium. I've done the research, read up on them, but now I'd like some firsthand advice from actual owners.
I understand they have a tendency to jump. I'm not concerned about them escaping when I'm not there, since my tank is peaceful and there are no immediate threats, and my hood is secured with no places to really escape out of. I'm worried that during my water changes, when the hood is OFF, one of them will jump out as I'm siphoning water, getting a new bucket full or whatever. How easily are these fish startled into jumping, and how powerful are the jumps?
How many should I get? I understand at least 4 or 5 to make them feel safe, but is that all? Are they fragile fish? Fussy? I understand they bicker amongst themselves but not to the point where they hurt eachother, right?
Regarding shelter. Being top dwellers there aren't many spots for them to hide and feel secure in (which adds to my concern about them panicking and trying to jump out when opportunity presents itself). I HAVE, however, recently fastened a bunch of plastic plants to the hood with a bit of fishing line, which is JUST long enough to allow the plants to float on the surface but remain stationary so as not to float around the top freely. Is this adequate? These bunches are on both ends of the tank. Plastic plants too.
Would you say my tank is suitable for 4 or 5 Hatchetfish? Any other suggestions?