I came home from vacation, I did have home care for my fish while I was away. I found my Betta lethargic and sitting on the bottom. I really didn't know what to do....tank was clean, he had been given his pre-measured food while I was away. My betta keepers out there know you do not use Melafix or Pimafix on bettas. I really didn't want to use Bettafix, still worried about this product. I went to Petco and found this product - Dark Water. I used as recommended....after about 6 days, my betta wanted to eat. He started swimming again....now 2 weeks later, he is back to his old self. I think he had an infection and this product helped him fight it. Don't overdose, just use as recommended. he is in a five gallon, THE WATER DOES NOT GET DARK, ITS OK! I am so grateful this healed my little buddy! Thank you Fritz!!

This product works very well. It darken the tank up perfectly.

Product is great but won't use in a tank larger then 40 gal.

Put this in and I am now the proud owner of so many new shoots and so much growth its crazy.

I bought this and have had 3 fish and they have all died within a week DO NOT USE

I bought this a week ago and today I come to find out tonight it killed my axolotl in a spand of a week

Fritz dark water is a great addition to any tank. It helps to recreate the bettas natural habitat. It is wonderful for bettas with fin rot, or even just bettas that have really long fins. Definite must have in fishkeeping.

I bought this for my sick betta. Unfortunately, she passed anyway. Now I use it for my other betta who enjoys it. It doesn’t change the color much unless you add a whole lot, which is not recommended because it can drastically change your ph. Having carbon in the filter also eats up the color so that might be my problem. I use this for water changes or if my betta looks like she’s getting sick. Indian almond leaves or mopani wood also help tint the water and can be used with this.