watering plants with fishtank water | Grasscity Forums

breeding fish I always used my fish tank water for my plants and they Loved it.
Photo provided by Flickr
Green water itself presents little danger to an aquarium, besides making the tank look unclean. However, green water can be a sign of a more serious problem with the lighting or the water chemistry. In extreme cases, algae may block light, preventing plants from getting the light they need to thrive. It is unlikely that green water can pose any direct problems for aquarium fish.
Having plants in your fish tank will not alter the need for weekly water changes, but they will improve water quality between changes.
Photo provided by Flickr
Large volumes of water enable more stability in a tank by diluting effects from death or contamination events that push an aquarium away from equilibrium. The bigger the tank, the easier such a is to absorb, because the effects of that event are diluted. For example, the death of the only fish in an 11-litre (3 US gal; 2 imp gal) tank causes dramatic changes in the system, while the death of that same fish in a 400-litre (110 US gal; 88 imp gal) tank with many other fish in it represents only a minor change. For this reason, hobbyists often favor larger tanks, as they require less attention. You can also plant aquatic plants in the fish tank. They will provide a more natural habitat for the fish and aid in purifying the water.
Photo provided by FlickrWould watering my plants with fish tank water be beneficial for the plants
Photo provided by FlickrFish tank water as fertilizer for plants? | Rollitup
Photo provided by Flickr
Actually if you use the fish tank water for plants you may be inhibiting the plants' growth in the long run. Fish kept in aquariums produce growth inhibiting hormones to keep them from outgrowing their tank. These are also released into the surrounding water and will have the same effect on any plants which receive this water. When hydroponics first became popular, many people used fish tank efluvia as a growing medium until the efects of these hormones became evident. There was an article on this in one of the back issues of Mother Earth News.I too always use my tank water for my plants. I worked in a pet store that also did this. When the store caught on fire everything died but the plants. I still have some after 10 years. I always said it was from the fish water. I use no chemicals in my tank except for the initial ilimitaion of chlorine. I never mess with the PH and have no alge. But I wouldn't give it to a cat. It does contain harmful bacteria. I am a cancer survivor and when on chemotherapy I was told not to touch my fish tank. There really are lots of little micro organizems in there that could harm another animal if consumed in quantity.If the fish you have in the tank only get to a certain size like guppies or betas then watering your plants with them won't have any negative effect unless they don't like high amounts of nitrogen. The fish won't be producing any growth stunted hormones to affect your plants. Won't happen if you have fish in tanks that they have more than needed room for growth either. For example lets say that you have 3 oscars about 3 inches each in length in an 80 gal tank with an pleco that was about 10 inches the hormones shouldn't be in that water. Having spent the last 20 years watering various parts of my yard and garden with fish water I haven't seen much of a problem with stunted shrubs. The hedge closest to my front door is actually larger than the other four. (During the winter I don't care to tote fishy waste water very far in 30 degree temps is what I guess is the reason) My three cats drink out of my tanks but I don't water them with it. I just think it's a bad idea, right there with letting them drink out of the commode bowl. Most of the fish I have are omnivores that I feed goldfish and blanched zucchini to so that could account for it too. Hope this helps you.My Friend Ed has an aquarium which is a hobby I’m interested in as well. Perhaps once things settle down with the house I can start one. Ed told me something interesting, when he changes the water in his tank, he saves it and uses it to water his plants! My first thought was… hoarding old, dirty fish water is totally weird and gross but Ed explained that fish excrements in the water act as a natural fertilizer for plants*.