In Italiano

The particular one

Piccolo(click to enlarge)

Fresh water, 20 litres, temperature 20-30 °C, pH neutral, nitrate 10 mg/l
There aren't fishes, only small crustacean, bivalve, snails and plants.

Heater and temperature sensor are hidden behind the half empty rock colon made sticking porous stones, large holes among stones assure water circulation for convection, there isn't a pump, it could devours smaller organisms.
There is an air pump regulated to the minimum to move water.
A small amount of detritus is maintained in the bottom just like in nature; in the rear glass I let to develop a substrate of alga very appreciated by the inhabitants.
The difficult side of this kind of aquarium is to maintain the right equilibrium among all life forms and the small environment.
Food: fish food pulverised in a small mortar, pollen, boiled vegetable and fruit.
It's always true the gold rule of any aquarium: never exaggerate with food; a week without food will not kill them, a single excess will do.
10% water change every three/four weeks with 24 hours rested home water to let chlorine to evaporate (just fill a 2 litres plastic bottle and leave it open).

The inhabitants

The inhabitants

(6 + x) Neocaridinas

Caridina(female 20mm long with grey mature eggs)  Caridina(small one 10mm long with a gold snail)
Neocaridina  Piccolo Neocaridina Piccolo  (New born about 3mm long)
Neocaridina(male 19mm long) Detail(Top view)  Stelle(The spots have a stellar shape, 164 Kb)

The female with grey mature eggs started to release the new born after 3 days from the purchase, the small ones are 3mm long and quite similar to the adults.
Update: new born have grown to 5-6 mm in 4 weeks, the survival rate is high, I've count 8.
Update: at 6 weeks from birth they are 6-8 mm, I've count 12 grouping them with a piece of bread.
Update: a second female has black eggs, after two weeks they are dirty white with black eyes, the opening started after about three weeks, I've count 7 new born but probably they are more; I'll have too much of them in few months.
Update: after 10 months from the introduction of the firsts 6 Neos the population reached about 30-35 elements, the new born rate is quite low now, the population is healthy.
Breeding easy.


Gammaride(Female with eggs, click to enlarge) Gammaride(New born of about 2mm)
Gammaridi(Couple, click to enlarge) Gammaridi(Couple, click to enlarge)
Gammaride(Attack to the carrot, click to enlarge)
Gammaride(Male with a copepod on the right)

Crustacean 18mm long for male, 15mm for female, the new born are similar to the adult and are about 1.5mm long.
Eggs, from 5 to 15 below female abdomen, are black at the beginning and yellow when mature.
It's easy to distinguish sex, female are smaller and have eggs often; males have front paws more robust and with a hook to clasp female.
Their position is arch like but they recline in a strait line when they swim fast.
They damage partially plants but without ravage them.
They are omnivore, with a vivacious character and social, typically they forms small groups.
It isn't a good sign if they start to be frenetic, another bad news is the change of colour to white/yellow, a possible cause is the shortage of oxygen or bacterium proliferation.
The first number reduction started after two weeks, after 6 weeks their number is drastically reduced, at about two months I've count only six of them; in the exoskeleton of dead one I've noticed black spots.

Delicate, breeding difficult, become extinct.


(With motion foot) Bivalve(It's about 3mm, click to enlarge)
Bivalve(Climbing the glass)

These bivalve, large till 5mm, despite very slow they can climb.
They filters the water, so, it's necessary to keep the right density of micro-organisms like
bacterium, rotifers, microalgae, etc. without exaggerate to avoid oxygen shortage due to bacterium; the water must be limpid.
Breeding difficult.

Copepods (Cyclops) (click to enlarge)
Copepode Copepode Copepode Copepode Copepode Specchio

Crustacean 1mm long, on the back side you can see two groups of eggs.
From the images you understand why they are called cyclops, the have only one reddish eye.
Breeding easy, in summer (28-30 °C) their number drastically falls but just below 25 °C it increase again.


Ostragode       (click to enlarge)

Crustacean 0.5mm - 1.5mm long enclosed in a couple of shells.
Breeding difficult but possible, their number is low.

Long conic snails

Conica(click to enlarge)  Conica(click to enlarge)

Maroon, 20mm long, they excavate the bottom cleaning and enriching it of oxygen without create problems to the plants.
Breeding easy, their number is stable.

Ellipsoidal gold snails
Ellissoidali(click to enlarge)Uova(Eight eggs with a small worm)  Schiusa(Opening)

Maroon/gold, 6mm long, inconceivably prolific.
Breeding very easy, their number grow exponentially in an aquarium without fishes, I'm moving them in the other aquarium.

Flat spiral snails

Spirale(click to enlarge)  Uova(click to enlarge)
Sorpasso Overtake, the spiral wins, the image is blurred due the impressive speed of the runners :-)

Maroon, 6mm long
, tranquil, they contribute to keep leaves clean.
Breeding easy, their number is stably high.

Short conic snails

Conica tozza  Nera(click to enlarge)

Black, 4mm long, very slow.
Breeding difficult, their number is low. Copyright (C) 2004-2005, Rod @

Updated on 6 January 2007