your water is not ideal for most apistogramma except for some of the most common farm raised ones, like Agassizi or cacatuoides.
kribs and bolivian rams get too big for a 15 gallon.
some apistos and the blue ram will not appreciate the lower temperatures required by neon tetras.
shell dwelling cichlids will dig, and your plants will go flying all over the place. they also are the most aggressive of all cichlids you have listed and will likely attack the neon tetras.
some cichlids which I personally believe will fit as a lone individual in your 15(or much better, 20) gallon tank are
- apisto agassizi or cacatuoides
- laetacara curviceps or dorsigera
- nannacara anomala
all of these dwarv species are considered beginner species or starter species for dwarf cichlids in general, and are all generally peaceful to non-cichlid tankmates, remain quite small and are tolerant of harder water
than most other dwarfs.
Thank you for your information. I don't actually have my tank set up fully yet, and I don't have any neon tetras anymore(sorry for the mixup) :)
Any time any person tells me they own fish, I automatically ask them a barrage of questions. "Please tell me it is not a bowl." Do you know what the Nitrogen Cycle is?" "Do you have a filter? What kind?" "How often do you replace water?" "How many fish do you have?" etc etc. Then I continue a discussion for about 20 more minutes before I realize I tend to be the only person that cares.
• 15 gallon long: One betta fish. Still working on it. Will be a planted aquarium.
sounds like you have a good handle on things now thanks to madagascarienes
the only thing I would add is to increase your weekly W/C to around 40 - 50%. smaller tanks can develop issues faster than larger tanks as there is much less water mass to spread out toxins.
Most here actually make 50% W/C on all their tanks weekly.
30 g FW planted:corys, female ABNP, blue angel, harleys, zebra danios, rummies,
15 g FW planted:2 male guppies, neons, pygmy corys, clown pleco, 4 types of shrimp, assassin snails
90 Gal Journal: http://bit.ly/1vC7gVX
fishless cycling: http://bit.ly/1DARf3T
fish in cycling: http://bit.ly/1ILvcfp
Find out the water hardness. If that's not too high then you could certainly keep a pair of apistogramma in a 15g.
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