Sven Kullander · CC BY-SA 4.0 — Wikimedia Commons (cropped)

Freshwater Fish · Cichlids

German Blue Ram

Mikrogeophagus ramirezi

Tiny dwarf cichlid for warm, soft waterIntermediate

Lifespan: 2-4 years
Size: 5-7cm
Social needs: Pairs or small groups; bonded pairs ideal
Time: Moderate
Cost: Medium
Diet: Omnivore (micro-pellets, frozen and live foods)

Overview

What is this animal?

The German blue ram is a small, brightly coloured dwarf cichlid from the warm Orinoco basin of Venezuela and Colombia.
Despite its tiny size, it shows the full personality of a cichlid in a peaceful, colourful package.

Rams are popular but often mis-sold as easy beginner fish; in truth their need for very warm, soft, clean water and their sensitivity to stress make them an intermediate species.
Well kept, they are characterful and rewarding.

Temperament

German blue rams are peaceful dwarf cichlids that pair-bond and become mildly territorial only around spawning sites.
They suit calm community tanks and rarely trouble other fish.

Keep them with peaceful, warm-tolerant tankmates such as small tetras, corydoras and rasboras, avoiding boisterous or nippy species that intimidate them.
A bonded pair will dig pits and guard eggs together; multiple pairs need space to claim separate territories.
Their gentle nature makes them easy to bully.

A good fit for

Keepers of warm, soft-water tanks
Aquarists wanting a peaceful dwarf cichlid
Those interested in pair-bonding behaviour
Planted community tanks without rowdy fish

Common mistakes to avoid

Cool or unstable water below 27C
Adding to a new, uncycled aquarium
Buying fragile hormone-dosed farmed stock
Housing with boisterous or nippy tankmates

Enclosure

Minimum 80 litres (21 US gallons) — for the pair

Cannot be kept alone. The minimum is 2, and the space above is for that group.

Provide a fully mature, well-planted tank of at least 80L kept very warm at 27-30C, soft and acidic (pH 5.5-7.0) with zero ammonia and nitrite and low nitrate.
Rams will not thrive in cooler community tanks.

Use soft substrate, driftwood, plants and gentle flow to replicate their slow tropical waters, with flat stones as spawning sites.
Stability matters; add rams only to a long-established aquarium, never a new one, and avoid sudden parameter changes that stress these sensitive fish.

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

German blue rams are omnivores that take a varied diet of quality micro-pellets and frozen or live foods such as bloodworm, brine shrimp, daphnia and cyclops.
They forage along the substrate, sifting and picking at food.

Feed small amounts once or twice daily, ensuring shy individuals get their share.
Live and frozen foods bring out their best colour and condition them for breeding.
Avoid overfeeding, and choose sinking foods suited to their bottom-oriented feeding style.

Health

Many German blue rams are weakened by intensive farming and hormone treatment, arriving fragile and prone to bacterial infections, parasites and sudden unexplained deaths, especially in cool or unstable water.
Watch for darkening, clamped fins, hiding and rapid breathing.

Very warm, soft, clean and stable water is the best safeguard.
Source fish from reputable breeders rather than mass farms, and quarantine new arrivals.
Their already short natural lifespan is further shortened by poor conditions, so keep parameters stable throughout.

Is your enclosure big enough?

Minimum volume80 litres (21 US gallons)

CompanyCannot be kept alone. The minimum is 2, 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