Río San José, Horquetas, Sarapiquí, Costa Rica

Aquarium information

Aquarium description

Set-up date

January, 2023

Aquarium decoration

The stones that were used are similar in color and shape to those of the San Jose River. The stones vary in size to shape the flow of the river, between these stones gravel of different sizes and colors was used to replicate the natural environment.

A 10-hour photoperiod with 6500k LED light was used to achieve the green algae on the stones.
This spectrum of light replicates the one seen in the river.

Aquarium equipment

Filtration is handled by a PenPlax Cascade 1500 canister filter. It holds 5 baskets with media: 1 for mechanical media and the other 4 are used for biological media.

Fish care

The aquarium recreates the open waters of the rapids on the San José River. The middle part of the water column is inhabited by the Astyanax aeneus fish and the crevices in the stones and bottom of the aquarium are the habitat of Amatitlania siquia.

Astyanax aeneus are very voracious fish, feeding on particles in the water column, on the surface, and even on any food found in the substrate. They feed in groups, while the Amatitlania siquia are more fearful fish and only move from their territory when they feel safe. These two grabbed a corner of the aquarium for each other and defend their territory.

Plant care

None.

Water care

The aquarium water has a high evaporation due to its temperature, so the percentage evaporated is replaced manually every two days and the water is changed every 8 days with 25% water changed. The filter is cleaned and maintained every 2 months to maintain the high water flow required by Astyanax aeneus.

Dimensions

Length

100 cm

Depth

50 cm

High

40 cm

Volume

198 L