Hi - there are 2 big pieces of mopani wood in there at the moment which are lowering the pH - they would go. In fact, I should clear it all out and then re-post the parameters, I suppose...
Dimensions are: Height 18 inches; Width 15 inches; Length 31 inches.
I'll have a look at the ones you mention!
How many of each one would I be looking at?
Hiya!
Hmm in all honesty it really depends what you're looking for in you're fish! If you want behaviour, go for central american cichlids as they are full of activity and personality however they come with a downside which is they are more aggressive to your average south american counterpart and thus limits stocking ideas. If you want looks and colour then south american is the way to go! It's alot easier to do a south american cichlid community with a variety of fishes however they arent as active and dont have as much personality as the CA cichlids. Also CA cichlids are alot more likely to attack the gouramis and possibly even the cories if you picked out a really mean one.
Good CA cichlids for your tank:
Convict cichlid (Only 1 as they are hyper aggressive when breeding)
Firemouth cichlid (If you're wanting a cichlid community I'd try a male and two females)
The convict cichlid will likely not tolerate alot of tank mates but will tolerate firemouths but if you do go for one I'd still keep an eye on it as it may be smaller than alot of cichlids but it makes up for it in fiestyness!
Firemouth cichlids are a little more easy going but have full potential causing trouble in tanks so again I'd keep an eye on them but they will tolerate way more fish species and will live with convicts.
Most other CA cichlids are unfortunately quite larger than these two and more aggressive aswell so I could only really think of the two
Good SA cichlids for your tank:
Bolivian ram (could go for 4 or even 6 if you really wanted)
Keyhole cichlid (Probably the most peaceful cichlid you could own!)
Kribensis (slightly more aggressive than the other two but very beautiful, I would only go for a pair)
Apistogramma (Stunning fish, peaceful and you can keep 3 with no issues!)
German blue ram (nice little fish, nowhere near as hardy as the others though)
Electric blue acara (Absolutely beautiful fish however the max size of this fish is contriversial with some growing larger than others but should be fine, I would watch out for this fish as it is slightly more aggressive than the others)
Orange head tapajos geophagus (One of the most beautiful freshwater fish you could own in my opinion! Again size may become an issue however they are the smallest of the geophagus so it really depends on you're stocking level)
last but not least
Angelfish (you could go for a pair of any colour of scalare angelfish out there! Again this might limit you're stocklist as they tend to grow fairly large for the tank you own)
I really hope I helped