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Hi I woke up this morning to find that my fish where dieing! not one to 2 till now I've lost about 10!!!! and they are still dropping. These fish had been in my tank for more than a year and where healthy, not any additions, no conditions changed.

ENVIRONMENTAL DATA
Water Parameters
Ammonia:0
Nitrite (note the “I&#8221: 0.3
Nitrate (note the “A):not avialble
pH:7.5
Temp:28C

Tank Information
Tank Size 50G
Stock List (Quantity/Species):
2 Angels 4in
10 neon tetras (2 left)
8 Cherry barbs (4left)
7 Panda Cories (3 left)
4 Albino cories (2 left)
1 Dojo Loach (dead)
2 Healstream Loaches
3 Clown loaches
5 Yoyo loaches
2 zebra loaches
2 Raphael Cat
1 Leopard pleco (dead) ]:| It had more than 2 years with me!
1 Clown Pleco
1 RM Pleco
2 Black Widow Tetra
7 Marble Hatchet (5 left)
10 Ottos (8 left)
4 SAE (3 left)

Filtration
Acuaclear 300 Canister
Tom power filter 200 Submerged

Heavily planted
DIY Co2 Injection


Last edited by Falstaf at 26-Dec-2004 18:42

You've got quite a load of trops there...

Your "heavily planted" tank may help to handle the nitrates but I suspect the nitrates may have risen to a dangerous level.

Dissolved oxygen in the water also will play a large role with such a large stocking of trops. When the dissolved oxygen begins to deplete some trops will react by hanging at the top of the tank and gasping while others will simply die quickly.

As far as I know there are no "Aquaclear 300 Canister" filters offered here in the States. Most are "hang-on-back" type.

You may wish to increase surface movement to provide a quicker oxygen and gas exchange considering the plants are just not doing the exchange rapidly enough anymore.

A reduction in trops should take the strain off the tank trying to maintain the high population.

--garyroland.

You are right Gary it's a Acuaclear 200 canister. the really strange thing is that it had that stock for over 6 months and they where all doing fine, nothing has changed since, same 2 weakley W/C cleaning one of the 2 filters media every time, activated carbon. i don't know what happend!

Tanks can, and often do, after awhile in operation with a large fish load, start to degrade...

Do the tests I suggested and make any changes even if you have to add another filter or a powerhead to move more surface water faster.

Post back after nitrate testing with the results.

--garyroland.