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When I fed my shrimps on saturday I counted 80 and yesterday all appeared well also. This morning all I can see is dead bodies with a reddish colour shell to the head area.............. I assume it is rust but am not certain, only going by what I have read here. From what I have read here it could be because the substrate was exhausted and the PH had risen to 7.5 last time I checked (though that was slowly over time)? I doubt there is much I can do at this stage, but I will set up the old 15L to put any ALIVE healthy looking shrimp in IF THERE ARE ANY! and close down the big tank and start again. I guess I know next time that when the PH indicates that the substrate isn't working properly to act quicker???? When does the learning finish! My main queries at this stage are: 1) Is it safe to put stuff from this tank with the dead shrimps into the small tank where I will put any healthy shrimps (If there are any alive that is) or will that be a bad idea, I am thinking, water, heater, maybe a plant or 2 etc. 2) How do I make the bad tank good now so that it won't be contaminated for the restart? Tank, filter, heater, plants, decorations etc. I will use new substrate. Simon

Hi, I've been running a 16L tank with 11 Bloody Mary and 6 NQAS for about 2-3 months. I recently added 25 Tangerine Tigers about 6-8 weeks ago. Water parameter are: PH 7.2 GH 6 KH 1 NH3 0 N02 0 NO3 10-20 TDS 150-200 Temp 24-27C. (Heater is set at 24C but it has been getting warmer recently in Melbourne) Problem 1: From last week, I started noticing 1-2 shrimps lying dead on the substrate. They looked slightly opaque in colour. This was almost daily over 2-3 days. I've since tore down the tank and moved the remaining shrimps into another temp tank. I only found 4 Tangs, 6 Bloody Mary and 6 NQAS left. Haven't really noticed the disappearance as the Tangs were still juvies and I had quite a bit of moss in the tank. Problem 2: At the same time, I've also noticed one of my adult female Bloody Mary turning white in the head (it's happened gradually over 2 weeks). Please see photo. From looking at the disease chart on this forum, I looked like it could be Rust head or bacteria infection. Not sure if they are related. Please advise if I can administer any treatment at this stage. Thanks.