Need Help Cloudy Water Rising No2

[nickhimself]

I am New to fish keeping but need some urgent advice!

I set up a 90litre tropical tank on 11 Nov. 07 with plants and bog wood.
Water test on 18th Dec was PH 7.6, Nitrite 0ppm, Amonia 0ppm and Nitrate 15ppm. Temp 73f

20th Dec. Introduced 6 guppys (2m,4f.), 2 Swordtails (1m,1f.) and 2 marbled Mollies (1m, 1f.)
Lost the 2 male guppys over 2 days, after about 1 week Amonia and Nitrite levels 0ppm. 30th Dec noticed 1 female Guppy had developed a white band across the tail section this started to spred towards the tail more of a loss of colour than fungal growth.
Completed water test Nitrite and Amonia were stable 0ppm PH 7.6 and Nitrate 10ppm. I themn done 10% water change.
I was advised by local pet shop/aquatic centre (which I don't have much faith in) to use anti fungal solution, which I did on the 2nd Jan.
6th Jan (yesterday) the water had gone very cloudy/milky Amonia level 0ppm but Nitrite up to 0.25ppm Nitrate 10. I done a 20% water change and rinced out the filter medium in the discarded tank water.
Cheked the water this morning and the Amonia level is 0ppm but the Nitrite has risen to 1.0ppm the water is still cloudy and the Nitrate is 10

I have been feeding with general flake food only I pinch every day but none yesterday.

Can you give me any advice as to my next steps I am very concerned about the riing Nitrare levels.

Tanks
Nick

 

[WILDER]

Did the tank cycle the first time, as ammonia goes off the chart then nitrites appear going off the chart till they come down to 0
If so the med could of knocked your benefical bacteria and causing a mini cycle.
Cloudy tank usually mean bacteria bloom.
Increase aeration in the tank, and water changes.

 

[nickhimself]

Did the tank cycle the first time, as ammonia goes off the chart then nitrites appear going off the chart till they come down to 0
If so the med could of knocked your benefical bacteria and causing a mini cycle.
Cloudy tank usually mean bacteria bloom.
Increase aeration in the tank, and water changes.

Thanks Wilder for a speedy reply. The tank has not cycled while I have had the fish in, Amonia and Nitrite levels have remained stable.
Initialy it took several water changes over the month prior to adding fish to get the levels down.
How often would you suggest I do the water changes to get over this problem.
Do you need a seperate pump and airstone or can I just adjust the valve on top of my Fluval 2 pump which streams bubbles.

Tanks
Nick

 

[WILDER]

Best not to do very large water changes as it slows the cycle down.
If you can turn the filter up you should get away with not having a pump and airstone, though they do have there uses very good when adding meds and warm weather, and also some fish like playing the in the bubbles.
I would go by your water stats with the water changes if high keep preforming them, but not very large water changes 30%.