I have never seen him eat, I know he eats but the quantity I am unsure of.
He used to always hide earlier, now he has become a bit more brave and comes out and sits in the open.
What could it be, if say he did have a loss of appetite
It could be more than one thing, vitamin deficiency included. A complete shot in the dark would be a parasite that's damaging the fish's central nervous system and/or brain. For the whole head to suddenly be bent downward, it looks like a seizure, epilepsy-like attack.
I still think it is the diet related.
When I say shrimp, it is not market prawn, this is macrobrachium rossenbergi, I used to get live, and the fish was in great shape all the while it ate these.
How can I add vitamin b1 to its diet.
The Tilapia I give is wild caught Tilapia, and not from farms, and the fillet is just not meat, I don't get the fish skinned before filleting, so there is skin.
It takes a while, sometimes a long while for the vitamin deficiency to set in all the while a fish would act normal.
Vitamin soak or quality pellet or wholesome and fresh baitfish, etc.
Skin-on is better but still not great. Piscivores need a complete package, a whole fish, including head, guts, bones, scales. Most of the goodies are in the head and in the internal organs, which lack altogether in the fillet diet.
thebiggerthebetter
, mate I always knew feeding saltwater market prawn would cause trouble and hence I never used it.
Although I used macrobrachium rossenbergi, live one's, these are pure freshwater shrimp and I have been using these for a very long time.
I have no time to but you can look up thiaminase content in various crustaceans or in salt water versus fresh water shrimp. I doubt you will find a significant enough difference.
As I stated, if you suddently make it consume a large dose of vitamin B1 and the fish suddenly improves, that'd would prove this point. Of not, it'd be refuted and the search for a cause should go on.
Otherwise, I fear, while are talking, the fish is wasting away until the damage is irreparable. Again, I could be a mile off the mark, but to my humble mind, thiaminase or some other type of malnutrition is a likely cause.
Fish not only needs vitamins and minerals but also trace elements, enzymes, co-factors, etc. which are only found in wholesome foods, such as fresh whole thawed bait fish and quality pellet.