11-22-2011, 02:48 PM
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Originally Posted by diablo13
Ok, so just to be safe I won't do the shrimp. By Group i'm assuming you just mean whatever gender, in the case of the Licorice Gourami, correct? Oh, and since I haven't seen any Boraras species of Rasbora at any LFS in the area for about 6 months, would Coral Red Pencilfish be a suitable subsitute? They seem to have similar requirments to these gouramis, but just checking.
In store tanks these fish are usually very "washed out" and differentiating male/female might be very difficult. A group of 7-8 should provide both. It wasn't until mine were in that 10g for a couple weeks that the two males became obvious. And now, they darken significantly when they challenge each other, which is quite beautiful to see (the colour change, I mean).
Nannostomus mortenthaleri do need identical water parameters. I have a group of these, I also have the closely-related N. rubrocaudatus. I intend to reset my 29g for the latter, and when I do I plan to move the Licorice in with them. I have Boraras maculatus in with the N. mortenthaleri and there has never been any aggression by the pencils to the much smaller and equally-bright red Boraras, at least not that I have observed. On the other side, the pencils are large enough that I don't expect the Licorice to go after them. But I can't say yet.
Another probably suitable tankmate for the gourami species would be Trigonostigma hengeli or T. espei. I had these in with my two Chocolate species with no issues. The Harlequin rasbora is the same genus but a bit larger, though also peaceful.