Black Molly Illness

Tank size:53ltr
pH:7.2
ammonia:4
nitrite:5 (API test kit states both nitrate and nitrite are ok because its a new aqauarium (3weeks)
nitrate:5
kH:
gH:
tank temp:27

Fish Symptoms (include full description including lesion, color, location, fish behavior):No change just white spots/fungus type spots on my black mollys every other fish ok!!

Volume and Frequency of water changes:25% change yesterday and no problems prior to this

Chemical Additives or Media in your tank:Biotopol, Ferropol Denitrol (JBL)

Tank inhabitants:Guppy, Black Molly Cardinal tetra Dwarf Gourami

Recent additions to your tank (living or decoration):None

Exposure to chemicals:None

Pazmeister said:

Tank size:53ltr
pH:7.2
ammonia:4
nitrite:5 (API test kit states both nitrate and nitrite are ok because its a new aqauarium (3weeks)
nitrate:5
kH:
gH:
tank temp:27

Fish Symptoms (include full description including lesion, color, location, fish behavior):No change just white spots/fungus type spots on my black mollys every other fish ok!!

Volume and Frequency of water changes:25% change yesterday and no problems prior to this

Chemical Additives or Media in your tank:Biotopol, Ferropol Denitrol (JBL)

Tank inhabitants:Guppy, Black Molly Cardinal tetra Dwarf Gourami

Recent additions to your tank (living or decoration):None

Exposure to chemicals:None

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Black mollies are very prone to this, mainly due to stress. Everytime I've had a new black Molly its had white spot for a day or two, though it always clears up by itself.

I think it must be because i changed so much water (11ltrs) about 25% I normally only change 5 ltrs at a time, they were fine before this, thats reassuring just be happier once the tank is fully mature

Your molly has ich and need to be treated right away! Go to your LFS for some medication and I also highly recommend adding some salt to your tank, it's a natural way to fight off most disease. Raising the temperature to about 29-30 would help kill the disease too. Your ammonia and nitrite levels are too high also.

The molly has whitespot probably caused by stress brought on by your water conditions. Your ammonia and nitrite reading should be zero, anything above 0.25 is bad.

You say your tank is three weeks old, so you should be doing large daily water changes. Before treating the tank for whitespot, I suggest you do as big a water change as you can, leaving just enough water for the fish to swim in. Give the gravel, if tht's what's on the bottom, a very thorough clean at the same time. You need to get the ammonia and nitrite readings down to zero, then keep them there. You are in for quite a lot of hard work I'm afraid. Because you will need to treat the tank for whitespot, I suggest you do a 50% water change before each dose of medication. On any days you don't dose the medication (some miss a day or two) still do the water change, but add enough med to dose the amount of water your replace so the amount of med is unchanged.

Do the huge water change asap, then read this http/www.fishforums.net/index.php?/topic/224306-fish-in-cycling/ It explains what you need to do to keep the fish alive. The denitrol you've been adding is a bacteria product. As you are now finding, most of them don't work leaving the user in a fish-in cycle.

I wouldn't add salt, the cardinals and gourami won't be happy with that, though it's fine for mollies and guppies..