Pia Helminen · CC BY 2.5 — Wikimedia Commons

Freshwater Fish · Cichlids

Bolivian Ram

Mikrogeophagus altispinosus

The forgiving ram for ordinary community tanksBeginner

Lifespan: 4-6 years, sometimes longer
Size: 7-8cm (3in); males larger than females
Social needs: Bonded pair or mixed-sex group of 6+; community-safe
Time: 10-15 min daily; weekly water change
Cost: Medium
Diet: Omnivore / substrate-sifter (sinking micro-pellets, frozen foods)

Overview

What is this animal?

The Bolivian ram is the hardy cousin of the German blue ram, hailing from the cooler Mamore and Guapore river systems of Bolivia and western Brazil rather than the hot Orinoco.
It is the dwarf cichlid most often recommended as a first cichlid, because it accepts the ordinary temperatures and moderate water chemistry of a standard community tank.

Its colours are subtler than the blue ram's — an olive-gold body with a black eye bar, a dark flank blotch, red-edged fins and the tall front dorsal spines that give it the name altispinosus.
What it lacks in neon it repays in personality, with a distinctive stop-and-go hopping swim and a lifespan of four to six years, roughly double what most German blue rams manage.

It grows noticeably larger than the blue ram, reaching a standard length of about 7-8cm (3in), with males the larger, more intensely coloured and slightly longer-finned sex.
Treat it as a genuine long-term community centrepiece rather than a disposable splash of colour.

Temperament

Bolivian rams are peaceful and community-safe, mixing well with small tetras, rasboras and corydoras, and they show only mild territoriality around a spawning site.
They are not fin-nippers and are more likely to be bullied than to bully.

Juveniles are very difficult to sex, so buy a group of six young fish and let a pair form naturally rather than trusting a shop-picked 'pair'.
Once a pair bonds, be ready to give the extras more space or rehome them if squabbling starts in a smaller tank.

A bonded pair are biparental substrate spawners that clean a flat stone, guard the eggs together and shepherd their cloud of fry around the tank — one of the best brood-care displays available to a beginner.
Avoid stocking them alongside other bottom-territorial cichlids in tanks under about 200 litres.

A good fit for

First-time cichlid keepers with a cycled, mature tank
Standard-temperature community tanks (72-79F)
Aquarists who found German blue rams too fragile
Watching genuine pair-bonding and biparental brood care
Sand-bottomed planted aquariums

Common mistakes to avoid

Adding to a new, uncycled aquarium
Gravel-only tanks with no sand to sift
Undersizing a pair (30 gal) or a group (55 gal+)
Fast, greedy tankmates outcompeting them at feeding time
Buying a shop-guessed 'pair' instead of a juvenile group
Confusing its needs with the much warmer German blue ram

Enclosure

Minimum 110 litres (29 US gallons) — for a group of 6

Cannot be kept alone. The minimum is 6, and the space above is for that group.

A pair needs around 110 litres (30 gallons) as a practical minimum, and a long footprint beats a tall one because floor area matters far more to this bottom-cruising fish than height.
The old advice of a 20-gallon long is on the small side for a cichlid that reaches 8cm and patrols the substrate all day, and a mixed-sex group of six or more wants a 120cm tank of roughly 200 litres (55 gallons) so subordinate fish can escape a courting pair.

Keep the water at 72-79F (22-26C) with a pH of 6.0-7.5 and soft to moderately hard water (up to about 180 ppm / 10 dGH) — normal tropical community conditions, and the single biggest difference from the German blue ram, which wants roughly 28-30C to thrive.
Fine sand substrate is essential, not optional, because these are benthophagic earth-eaters that feed by sifting mouthfuls of sand and spitting it back out.

Furnish with driftwood, plants and a few flat stones or a slate as potential spawning sites, and break up sightlines so a pair can hold a modest territory without stress.
The tank must be fully cycled and mature with low nitrate; adding rams to a freshly set-up aquarium is the classic beginner mistake.

Check your enclosure

Supplies

Setup

Tank and stand
Filter
Heater and thermometer
Substrate, plants and decor
Liquid test kit
Dechlorinator and starter supplies

Ongoing

Quality cichlid pellet sized to your species
Tropical flake as a secondary staple
Frozen bloodworm, brine shrimp and daphnia
Spirulina or vegetable flake
Live blackworms for conditioning (optional)
Small thawing cup
Turkey baster for target-feeding shy fish
Fine net for removing leftovers

Safe substrate: Inert aquarium gravel · Fine, smooth sand · Aquasoil for planted tanks

Work out the cost

Care routine

Daily

Check temperature and equipment
Feed
Head-count and look everyone over

Weekly

Frequent partial water changeevery 3 days
Top up evaporationevery 3 days
Check territories and pairing
Clean glass and clear algae
Test the water

Monthly

Trim and thin the plantsevery 2 weeks
Check supplies and reagent dates
Rinse the filter media

Less often

Replace chemical filter media (Carbon/Purigen)every 2 months

Vet: Quarterly water and territory review — every 3 months

Top resources for more info

Independent creators and organisations we would send a friend to. We have no affiliation with any of them, and nothing here is sponsored. Links checked 2026-09-19.

YouTubers

Girl Talks FishCare how-tos by fish type, tank setup and beginner mistakes Aquarium Co-OpSpecies care guides, filtration and fish health (run by a retailer)Prime Time AquaticsSpecies profiles, stocking and water chemistry explained plainly

Sites

American Cichlid AssociationThe cichlid keepers' society, with articles and species information Seriously FishSpecies profiles with tank size, water parameters and diet for 1,800+ fish Practical FishkeepingLong-running UK fishkeeping magazine with care and species articles

Go deeper

Diet

Bolivian rams are omnivores that feed by taking in mouthfuls of sand and blowing the substrate back out through the mouth and gills, keeping the edible bits.
Offer quality sinking micro-pellets as the staple, alongside frozen or live bloodworm, brine shrimp and daphnia for colour and conditioning.

They are slow, deliberate feeders and are easily beaten to food by fast tankmates like danios or barbs.
Drop food near their patch of the tank and watch that they actually eat, rather than assuming flakes at the surface will reach them.

Feed small amounts once or twice daily and let them graze the substrate between meals.
Floating-only foods are a poor match for a fish built to feed off the bottom.

Health

This is a genuinely robust dwarf cichlid, largely free of the hormone-dosed farm fragility that plagues German blue rams, and most stock is tank-bred.
Kept properly, sudden unexplained deaths are rare rather than expected.

The common failure modes are slow ones: nitrate creeping upward between skipped water changes, an immature tank, or temperatures allowed to drift below about 72F, which invites ich.
Watch for clamped fins, faded body colour, hiding, and a hollow belly or white stringy faeces suggesting internal parasites.

Weekly water changes of 25-30 percent and a stable heater are most of the health plan.
Quarantine new arrivals for a few weeks before adding them to the display tank.

Is your enclosure big enough?

Minimum volume110 litres (29 US gallons)

CompanyCannot be kept alone. The minimum is 6, and the space above is for that group.

Length

Width

Height

Units

Or tank volume

Units

Is this urgent?

In a fish tank the patient is usually the water. Test before you treat — dosing a healthy tank for a disease it does not have makes things worse.

Go now

Any detectable ammonia or nitrite in a stocked tankLarge water change now with dechlorinated, temperature-matched water. Stop feeding. Test again in 12 hours. Both are directly toxic. How toxic the ammonia reading is depends on pH and temperature, so the same number can be harmless or lethal.

Now

Fish gasping at the surface, or crowding the filter outflowIncrease surface agitation immediately, then test the water. Either the oxygen has crashed or the gills are being chemically burned. Both are hours-scale problems.

Now

Sudden deaths, more than one fish in a dayTest ammonia, nitrite, nitrate and temperature before doing anything else. Do not add medication yet. Multiple simultaneous deaths point at the water or the equipment, not at a pathogen.

Now

Today

Flashing — repeatedly scraping against decor or substrateTest the water, then look closely for parasites. Irritation is either chemical or parasitic; the test tells you which before you medicate.

Today

White salt-grain spots over the body and finsBegin the appropriate treatment today and check the temperature. The parasite's life cycle is temperature-driven, and it multiplies with every cycle you wait.

Today

Soon

Clamped fins, hiding, or refusing food for more than two daysTest the water and review recent changes. Usually the earliest visible sign of a parameter drifting.

A few days

Never add a new fish to a tank that is not fully cycled, and never treat blind. A test kit is cheaper than the fish.

This is general guidance for a healthy adult, not a diagnosis. An exotics vet who knows your animal always overrides it — and the time to find one is before you need one.

What it really costs

Setup, monthly, first year and across a whole life, itemised and with the electricity worked out from the actual wattage. Published figures for the same animal disagree by a factor of four, so the calculator shows ranges rather than picking one.

Region

How many animals

Your electricity price, per kWh

Buying the setup

Bedding and substrate

Substrate in an aquarium is a filter as much as a floor. Most of the biology lives in and on it.

Safe

Inert aquarium gravelRinse thoroughly before use. Grain size should be too large to swallow and too small to trap food.

safe

Fine, smooth sandCorrect for corydoras, kuhli loaches and anything that sifts. Their barbels wear away on sharp gravel.

safe

Aquasoil for planted tanksExcellent for plants, but it leaches ammonia for the first weeks. Cycle around it; do not stock into it.

safe

Bare bottomLegitimate for quarantine and grow-out tanks. Easy to clean, but it holds far less biological filtration.

safe

With a caveat

Crushed coral or aragoniteDeliberately raises hardness and pH. Correct for rift-lake cichlids, wrong for soft-water species.

with a caveat

Very deep sand bedsAnaerobic pockets form below about 5 cm in still sand. Either keep it shallow or keep it stirred.

with a caveat

Painted or coated gravelUsually fine, but coatings chip. Test a handful in a jar for a week first.

with a caveat

Never

Sharp or angular gravel with bottom-dwellersWears down barbels and leads to infection in corydoras and loaches.

never

Anything containing metal, limestone of unknown origin, or shells in a soft-water tankSlowly alters chemistry in ways that are hard to diagnose later.

never

This is our general list for freshwater fish. We have not built one specific to Cichlids yet.

My kit says 0.25 ppm. Is that dangerous?

A liquid kit measures total ammonia, but only the un-ionised fraction is really toxic, and that fraction is governed by pH and temperature — each whole pH unit multiplies it roughly tenfold. So the same reading can be nearly harmless in one tank and lethal in another; this works out which one you are in.

Total ammonia, ppm

Temperature, C