This is mine:
Siamese Algae Eater, Crossocheilus siamensis (Smith, 1931)
This slender algae eating barb is the only known fish that eats red algae. It comes from the flowing waters of Thailand and the Malay peninsula. It was first brought to Europe in 1962, but became popular in the 1970's when its ability to eat red algae was noticed. The fish is also known as Siamese Flying Fox, and Siamese Fox. It previous scientific name was Epalzeorhynchus siamensis. To those interested in the fine, but admittedly boring details of taxonomy, the genus Crossocheilus differs from Epalzeorhynchus by rhynal lobes (nasal lobes).
Description
It is a slender, grayish-brown fish with a distinctive black horizontal stripe. Maximum length is 15 cm (6") and might be obtained in two years, if the conditions are optimal. Normally They grow slower and don't always reach that size in captivity. They can live over 10 years. All the fins are transparent or slightly milky without any yellow or reddish sheen. The black band goes from nose to the fork of the tail and its edges are zig-zagged. When a fish is stressed or fighting the black color fades significantly. Underparts are silvery white and there is no light stripe over the black, but the whole upper body is brownish and every scale has a dark edge, which make the top look reticular. Some dark scale edges might be seen under the black stripe. It has a pair of thin, forward-pointing barbels but they might be pressed against the cheeks when fish is swimming or resting. The long black stripe is also easy to see in young fishes, but the scale edge pattern and zig-zag edges are not clearly visible until the fish reaches the length of 5-7 cm (2-3"); the ones that are normally seen in European shops are about 3-5 cm (1-2") long. Adult females are often slightly fatter than males, no other sexual differences are known.
Behavior
It is an active and fast swimmer, which thrives best in schools but can also be kept alone or in pairs. It is a strong jumper and should not be kept in uncovered tank, because it will eventually jump. Siamese Algae Eaters often chase one another but they never get hurt in these fights.
C. siamensis has a peculiar resting position: it doesn't lie flat on its belly but keeps its body propped up with its tail, pelvic and pectoral fins. Young fish sometimes rest on broad leaves, adult specimens prefer resting on bottom or dense, low plants like Cryptocorynes. The swim bladder is not very developed, so the fish can't stay in midwater but it must be in constant motion or it sinks.
Needs
Siamese Algae Eater is not very demanding. Suitable temperature is 24-26 C (75-79F). They can tolerate pH from 5.5 to 8.0, but 6.5-7.0 is ideal.
Hardness should be less than 20 dH. Water should be clean and oxygenated, because they come from bright and fast-flowing streams. They eat algae, including red algae and all kind of live and prepared foods. It is very rare that they harm plants in their tank if they are given enough green food. They also eat algae when they are mature, but seem to prefer flake food. Liisa's fish eat Duckweed (Lemna minor) but have never touched any other plants. They haven't yet been bred in captivity, so all the specimens are caught from nature. It appears that the fish are seasonal and are not always available in the shops. Minimum tank size for a pair of adult Siamese Algae Eaters is 100 liters (25 gallons). The aquarium should be long and have lots of living plants.
Compatibility
As they are not aggressive, they can be kept in any community tank big enough. Their active behavior might stress some sensitive species like dwarf cichlids and prevent them from spawning. They should not be kept with Red-tailed Sharks (Epalzeorhynchus bicolor) unless the aquarium is large and well planted, because that species is very aggressive towards all its relatives.
My tank is purfect then, 180 litres, planted, hideing spaces, and they can be 6" but dont normaly reach that, my lfs said 3-4".
I think 1 is fatter than the other, good god i'd faint if they bred
Thankyou jflowers