Parachromis are straightforward and break down into two broad groups….some say three.
Jags and Dovii are the brutes and will need large tanks accordingly. Jags, being smaller are easier to mix in communities and are also the most common species to find. Care is straightforward and they’ll live/breed in any water as long as it is clean…they are found primarily in Honduras and Nicaragua. Leo in mind that males can still get up to 16-18”.
dovii need larger setups given their eventual adult size and are very aggressive as a rule, though exceptions have been well documented. Given their size, should be reserved for ideally a 300 gallon or larger. That said, many keep pairs in 72x24” tanks for life. Key is staying on top of water quality of course and decor being at a minimum in such a small tank. They are found primarily in Nicaragua and Costa Rica. Dovii are the true brutes of the cichlid world rivaling temensis bass and emperors cichlids for the title of largest cichlid species.
the second group include the Multifasciatus (formerly Friedrichshtali), Motaguense,and arguably the La Cieba since they are lumped in as a variant of Multifasciatus….though many feel they deserve to be their own species. Let the ichthyologist figure that out. Multifasciatus are straightforward and their care is just like the jag in a smaller, bright yellow package. They are found from southern Mexico down to Guatemala and Belize.
Motaguense, are a bit trickier and more sensitive to poor water conditions. This is the soecies among the Parachromis most likely to get bloat as juveniles. It’s important to include a lot of roughage in their diet like chitin from the shells of insects or a blend of veggies in their pellets. They also come from water with more flow. These are medium growing fish andget to about the same size as the Multifasciatus…about a foot long for males.
the last group, if you believe it doesn’t belong with the second group, is the Friedrichshtali (formerly Loisellei). These are the most southern species of Parachromis found primarily in Costa Rica and Panama. These are also the smallest species andand Males average 10-11”. Thought tk be the most docile (which has been my experience as well), theycan be mixed with better with the medium sized, less aggressive CA cichlid tankmates. Of course, that also depends on how much room you have in the tank.
all species will breed as soon as they hit sexual maturity which is early….with most species being able to sex out and mature at a fraction of their adult size…think somewhere in the 4.5-5” range, with Motaguense being the only exception to that rule. Temps are straightforward and can range from 74-82 degrees Fahrenheit . 76-80 being better. Or 78 if you split the difference. Water params aren’t crucial but they do prefer water slightly harder than neutral…more on the alkaline side.
for pairs,my opinionfor minimum tank size for adults would be 75-90 for the three smaller species and a 150-180 for the Jags. Dovii 240. Now I know I’m inviting controversy and really don’t feel like arguing with other members who disagree. This is just my opinion.
pair bonds are relatively stable. I mean that in a relative sense since CA cichlids as a rule have terrible pair bonds. That said, I’ve found them to be more stable than Amphilophus, Mesoheros, even Thorochthys. Many breeders will use an incomplete or full divider to breed them. I hate the look of dividers, so I choose to fashion hideouts and caves large enough for the female, but too small for males. If your goal is to breed instead of a display, go with the divider method. It’s the surest way toprotect whoever partner is weaker. (It’s not always the female that gets whacked).
Feeding is easy, care is straightforward. And they are among the easiest cichlids to breed. They require very little effort as long as you follow the basics.
there was a long period in my hobby where I was obsessed with Parachromis. That’s largely why I set up a tank with them again after a long hiatus. You’ll enjoy them. PM me if I could be of anymore assistance.
on a final note, there will be people here who disagree with me. And I really don’t have the energy to debate, argue, or prove anything. This has been my experience and I have a lot of it.
hope this helps.