i knwo im posting a lot but you guys are really knowledgeable!
soo far..
silver sharks -(2)
red tail black shark (1)
german blue ram (2)
zebra snail - (2)
blue lobster (1)
200 litre tank - this be overstcked? wrong fish?
thanks
You have about 44 gallons, so after gravel and decor I'd say probably 40 gallons.
That gives you at maximum, 80 inches of fish.
Your bala sharks are equal to about 12 to 16 inches.
Your red tail black shark equal to 6 inches.
Your rams if they're the small type, 5 inches.
Ignore the inverts.
27 inches used up so far. You've got another 53 to go. Don't go nuts as this is just a very rough guide.
As for your selections, your pairing of dwarf rams is spot on, they love being in pairs. Your red tail may harass your balas, and your blue rams may be a bit too peaceful for the boisterous sharks, and the red tail can get very territorial toward all three. Avoid any more similar looking species such as other "shark" type fish or anything that looks remotely similar. Go for robust, hardy fish that can fend off the red tail. Avoid species that are likely to be targetted by your sharks. A shoal of tiger barbs would probably would have been a good choice until you added the rams. My suggestion to you would be to get a smaller tank to house the rams with a few tetras, and stock your shark tank with boisterous fish like barbs, or remove the red tail and keep more cichlids, bala sharks, and tetras.
Failing that, avoid corys and other catfish, since the temperature requirements of the sharks and rams in particular don't match them.