Rozski Posted May 18, 2008 Report Share Posted May 18, 2008 Bought some malachite green and formalin (2 seperate bottles) ages ago, as a 'just in case' I ever needed it. Seems like I need to use some, as one of my neons and one of my cardinals each have a few white spots on them. So will be doing a water change later on today, turning the temp up and treating the tank. Just wanted to confirm dose rates though! My malachite green says 1 drop per litre of tank water. However, when I bought it, the lfs guy (knowledgable one) wrote 1mL per 20L on the bottle as a dose rate. Which should I use? Been scouring over old threads and things trying to find a dose rate but couldn't, so wanted to ask Tis a 170 litre tank, with cardinals, rummynoses, neons, rams, bristlenoses and a whiptail. Should I try just the malachite green or both the malachite green and formalin? Just scared of them being toxic to my fish :-? Quote Link to comment Share on other sites More sharing options...
ryanjury Posted May 18, 2008 Report Share Posted May 18, 2008 I think the green is what is used in the white spot cure, what strength is it? I haven't used that stuff for years but im sure someone will know! I always get rid of the whitespot by adding rock salt to the tank, I believe the salt is alot better because it is natural, doesn't harm the filter and you don't really even have to add charcoal or worry too much about getting it out, also it doesn't stain the silicon Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted May 18, 2008 Report Share Posted May 18, 2008 1 drop/litre is approx equal to 1ml/20litres Quote Link to comment Share on other sites More sharing options...
Rozski Posted May 18, 2008 Author Report Share Posted May 18, 2008 Cheers for the comments Don't have any visible silicone anyway, so not too much of a problem I know I need to treat every 3 days, continuing after visible spots are gone. Should I do a partial water change before each treatment, or do I just add more malachite green?? Quote Link to comment Share on other sites More sharing options...
Stella Posted May 18, 2008 Report Share Posted May 18, 2008 1 drop per litre of each med. Do a decent waterchange in three days (more frequently if there are a lot of spots) and add enough medication for the new water (if you need to replace 20 litres add another 20 drops of each med. Keep treating for a WEEK after the last spot is gone. This is crucial. Quote Link to comment Share on other sites More sharing options...
Rozski Posted May 18, 2008 Author Report Share Posted May 18, 2008 Thanks!! Just done a small water change, and turned the heater up. So will watch temp rise and add some meds later on, once the fish have settled from me poking around in there lol. Fingers crossed spots will get less instead of increasing. At the moment, theres only 3-5 spots on the neon and cardinal. Maybe a spot or 2 on 1 or 2 of the other cardinals, its hard to tell. Still swimming around and eating, but I've noticed that one cardinal hangs at the back when I am not there (swims right out hoping for food once I am there tho haha) Quote Link to comment Share on other sites More sharing options...
purplecatfish Posted May 18, 2008 Report Share Posted May 18, 2008 What is the concentration of the med? (Either in mg per L or %.) Quote Link to comment Share on other sites More sharing options...
Rozski Posted May 20, 2008 Author Report Share Posted May 20, 2008 Sorry, didn't see your reply, and I am at uni now so can't answer the question, but will when I get home and can check. Put methylene blue in on Sunday night. Tank didn't look blue at all on Monday morning though... should it?? And no, I don't have carbon in my filter Quote Link to comment Share on other sites More sharing options...
Stella Posted May 20, 2008 Report Share Posted May 20, 2008 Methylene blue now... are you confusing the names (easy to do) or mixing meds...? Quote Link to comment Share on other sites More sharing options...
Rozski Posted May 20, 2008 Author Report Share Posted May 20, 2008 hahaha, confusing names. Long days = no brain matter left for other thought. It is malachite green, and it says 20g/l on the bottle. So is it usual for the tank to be clear again after a day? Quote Link to comment Share on other sites More sharing options...
Stella Posted May 20, 2008 Report Share Posted May 20, 2008 I know the feeling. My brain died at 6pm YESTERDAY. I just can't process what others say to me today, quite embarassing. Now WORDS I can look at until they make sense.... OK, mal green is a bit photosensitive, it will lose the colour faster if your lights are on. Deosn't seem to affect its effectiveness, but someone else might be able to answer for sure. Quote Link to comment Share on other sites More sharing options...
purplecatfish Posted May 20, 2008 Report Share Posted May 20, 2008 http://www.aquatext.com/tables/malachi.htm Aquatext has some concentrations which depend on dose method. But I'll leave you to do the maths. From memory I think you're supposed to half the dose for scaleless fish (e.g. loaches), tetras and some catfish. Quote Link to comment Share on other sites More sharing options...
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