I'm the Skeptical Aquarist. I've been a beginner at keeping apartment-sized freshwater tropical fishes in planted aquaria for over fifty years.
Ancistrus dolichopterus ("L 183" for years) is a small Loricariid catfish, a warm black, peppered with tiny off-white spots and with a bold edging of skim-milk blue on its dorsal and caudal fins.
Apistogramma nijsseni is less commonly seen than A. agassizi or A. cacatuoides but every bit as colorful.
Salvinia auriculata and its close kin are highly specialized floating ferns that only thrive under strong lighting in open-top tanks
Puntius (aka Systomus, but now Desmopuntius) rhombo-ocellatus is a very pretty, small, lively but peaceful barb from south- and west-draining river systems of the island of Borneo.
Lowered electrolytes trigger spawning in the "Kirschbaum method": environmental cues for gonad maturation are connected to decrease in electrical conductivity rather than just to low pH values themselves.
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