Hi right my tank size are as follows 36/12/18, 3 angle fish 1inch diameter,2 red gourami, 2 orange gourami they are 2 inch long, 2 small platy, 2 small sword tails. i do 50% water change every third week, water temp is 18c subtrate is cleaned when i change the water, fish food i use is king british plecostomus tablet food and tropical fish flake food my filter is fluval 3. hope this helps thanks.
Thanks for the info, your tank is around 30gals;
Dimensions 91 x 30 x 46cm/36" x 12" x 18
Surface area 0.27 sqm/2.91 sq ft/ inches sq in
Volume 127 l./28 gal. (33.55 US gal.)
Probable volume 114 l./25 gal. (30 US gal.)
I would advise doing a 30-60% water change once a week instead of once every 3 weeks, doing more regular water changes will have many benefets for the fish, from helping keep more stable nitrate levels, to lowering the levels of free-swimming parasites and harmful bacteria levels in the water in the tank, to helping fight the negative effects of long term evaporation on the tank etc. You should also ideally clean the substrate when you do your once-weekly water change as well (particularly if you keep any bottom dwelling fish), what type of substrate do you have (gravel, sand, pebbles etc)?
The water temp is only 18 degree's celcius? This is too cold for your fish, your fish are tropical fish which mean they do best in temps 24-28degree's C, keeping tropical fish in coldwater temps will effect their metabolism and shorten their life expectancies and make them more prone to deseases/parasites and digestion problems etc.
Do you know what type of pleco you have? There are hundreds of types of plecos, varying a great deal in dietry requirements, care, and what sizes they grow to- some plecos only grow to 3inches long, while others grow to over 3ft long. So its important to find out what type of pleco you have exactly to make sure you know you are caring for it properly
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