I put a post on the other day after having 2 x consecutive power cuts and then trying to keep my fish alive, apart from 1 x dwarf gourami
they all seemed to recover, but today they all seem to have red gills and the other dwarf gourami has been hanging at the top of the tank, thr mollie has ben swimming round the tube of the upright to the filter seemingly to scratch.
The tetras that were put in the tank the day of the first power cut still stay in the flow of the water, or they dart around frantically, the other fish seem to be fine apart from pinky gills.
water stats remin at ammonia 0, nitrite, 0 , nitrate 5. PH is 7.6 temp is 26.
one for the tetras has a very red gill area and my lfs said he could have lost the scales covering his gills, ( i thought it a wound but it not). can post a picture. and will it grow back.
i have methylene blue and melafix and on the lfs advise put the methylene blue in the tank -
i am now worried that perhaps I shouldn't have put this med in the tank, reading other posts on the subject of medicines it seems that it can cause the tank harm and is difficult to clean out, and can stain the glass etc... etc...., and that i should have tried something else and that maybe there isn't much wrong after all.
I am extremelly worried as one posts said that the math blue can wipe out your bacteria colony.
Can anyone advise me and put my mind at rest, as it has taken me donkeys to get this far and am getting a bit stressed with how much hassle this all seems to be.
Thank you in advance

The tetras that were put in the tank the day of the first power cut still stay in the flow of the water, or they dart around frantically, the other fish seem to be fine apart from pinky gills.
water stats remin at ammonia 0, nitrite, 0 , nitrate 5. PH is 7.6 temp is 26.
one for the tetras has a very red gill area and my lfs said he could have lost the scales covering his gills, ( i thought it a wound but it not). can post a picture. and will it grow back.
i have methylene blue and melafix and on the lfs advise put the methylene blue in the tank -
i am now worried that perhaps I shouldn't have put this med in the tank, reading other posts on the subject of medicines it seems that it can cause the tank harm and is difficult to clean out, and can stain the glass etc... etc...., and that i should have tried something else and that maybe there isn't much wrong after all.
I am extremelly worried as one posts said that the math blue can wipe out your bacteria colony.
Can anyone advise me and put my mind at rest, as it has taken me donkeys to get this far and am getting a bit stressed with how much hassle this all seems to be.
Thank you in advance