hiya, rite, suggestion to help clear the tanks water so u can see in it!!!
check the filter, u can either try turning it off n on again, to see if its working, or u can take a bucket half full of tank water, and clean the filter in it, making sure that u clean out all the bits of plants that cud be in there.
rite, now put it back in the tank, turn it on, check and see if its more powerful or not.
do a 25% water change, but dnt 4get 2 decholrinate it with tap safe.
get dwn the shop and buy sum melafix - it can be found at most aquatic centres/shops, and isnt that expecnsive.
read the instructions, and work out how much u need 4 each treatment in ur size tank.
add 1 dose of melafix a day everyday 4 7 days, and feed as normal, but dnt do ne water changes.
on the 8th day, no water changes, and no melafix.
9th day, do a water change of abt 25%
if this doesnt help clear ur tank then i duno wot will. it sud help u solve the problem of fish dropping dead, and also clear the water with the water changes.
if the water is still hard 2 see thru o the 10th day do 10% water changes everyday for abt 5 days.
this sud help u alot!
keep us updated, as im sure that ppl will help u more and more if this isnt helping u.
Also, if u havent got test kits, either get sum (if u can afford them) or take the water dwn the shop u got the fish at and they will test it 4 free.
u need to test the ph, the Nitrite and the Nitrate. then u mite decide to test the ammonia.
dead fishies
GUD LUCK!!!