German blue ram
Mikrogeophagus ramirezi
advanced careOverview
The German blue ram (Mikrogeophagus ramirezi) is one of the most beautiful freshwater fish you can keep — electric blue speckles, a golden head and bold fins on a body barely 5 cm long. It is also one of the most demanding “small” fish in the hobby. Rams are not hardy community fillers; they are warm-water, soft-water specialists that punish an immature tank or careless water changes. Kept properly, a bonded pair is a fascinating, dig-and-forage centrepiece.
Tank & water
Give a pair at least 57 litres (15 gallons) of a fully matured, cycled tank — never a fresh setup.
- Heat, high and steady: hold 27–29 °C with a reliable heater. See what temperature a tropical tank should be.
- Soft and acidic: aim for pH 5.5–6.5 and low hardness. Test first with a kit; adjusting water is covered in raising or lowering pH.
- Pristine, gentle: a well-matured filter with soft flow, plus consistent water changes.
- Planted and shaded: plants, wood and leaf litter give the security that keeps rams confident.
Feeding
Rams are omnivores that lean meaty. Offer small, high-quality sinking pellets or micro foods plus regular frozen or live bloodworm, daphnia and brine shrimp. They forage the substrate, so a fine sand bed suits their natural sifting. Feed small amounts once or twice daily.
Tankmates
Choose calm, warm-tolerant companions: small tetras, rasboras, corydoras and peaceful dwarf cichlids like the Bolivian ram that also enjoy warm water. Avoid fin-nippers, boisterous barbs and anything that outcompetes them at feeding time. A single bonded pair is ideal; multiple rams need space to reduce squabbles. See how to tell if a tank is overstocked.
Prefer a hardier lookalike? The Bolivian ram is far more forgiving.
German blue ram — frequently asked questions
Are German blue rams good for beginners?
Not really. They are stunning but sensitive — they need warm, soft, stable water and a fully matured tank. Ammonia and nitrite from an uncycled tank, cool temperatures or big swings will quickly kill them. They suit a keeper with cycling and water-change routines already dialled in.
What temperature do German blue rams need?
Warmer than most community fish — 27–29 °C. This is one reason they struggle in a general community held at 24 °C. That heat speeds their metabolism and shortens their lives, so 2–3 years is a normal lifespan even with good care.
Do German blue rams need soft water?
They do best in soft, slightly acidic water (pH 5.5–6.5, low hardness), reflecting their Orinoco basin origins. Hard, alkaline tap water is a common cause of poor colour and short lives. Test your source water before buying them.
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