skjl47-can you go a little more in depth on the feeding thing, i feed them twice a day, once in the morning around 7 or 8 and then at night again about the same time so your saying i should skip feeding them sometimes? wouldnt that slow down there growth rate a little?, and the more i learn the more it makes me agree with you that the store employees will just say anything to get you to buy more- Levi
Hello; Feeding twice a day is likely too much. For adult fish, I feed once a day and skip a day with no food at all at least once a week. I try to feed so that he food is consumed fairly quickly, say ten to twenty minutes. There can be exceptions for some fish that have particular feeding needs like ottocinclus, plecostomas or some of the bottom dwellers. If I notice that a feeding seems a little heavy, I will skip the next day or two.
When I go away for a weekend or up to a week I do not provide any special feeding. I do not have friends feed my fish as this has led to disaster for me and others. Healthy and properly feed fish can go for a week(or even longer) without food.
Try not to think of fish and food the same way as for people or dogs. They are cold blooded and deal with food in a different way. Also that they come to the front of the tank and appear to be begging for food is not an indicator that they actually need to be fed. You are not being cruel to restrict their feeding or to skip a day with no feeding from time to time.
They will indeed will eat twice a day. I have seen fish eat untill they puke and then start to eat again. They are not to clever about it.
The down sides of overfeeding likely have more to do with water quality issues. Massive overfeeding can lead to short term toxic water quality and to dead fish. The extra food spoils and begings to decay and sours the water. The oxygen levels can be reduced and kill fish. There will also be excessive decay byproducts in the tank which is essentially a closed system.
Some have stated that the filter will take care of the extra food. A strong filter will suck the uneaten food into the filter media, but the decay process will simply happen there. As the excess food decays in the filter the decay products will be circulated back into the tank.
For less than massive overfeeding, but still overfeeding, there are long term issues. There seems to be an increased level of detritus and fish waste that can build up in the substrate. The water quality in general can be affected. The systems that help to keep the water quality in balance become more on an edge so that somewhat small problems turn into much bigger problems.
An example is when water quality conditions are strained and a fish dies. When the conditions are already on an edge the death of a fish can lead to sour water very quickly, where a tank with better water quality can have a bit more of a buffer and give you more time.
If you find yourself overfeeding there are some things that can help. I like to have live plants in a tank, either floating or rooted. Live plants can take up some of these byproducts as part of their life processes. live plants also make oxygen when lights are on. I like to have snails in tanks. Snails will consume the excess food and my sense is that this is a better outcome than the rot/decay process and it gets the stuff into a form better used by the plants. I also like to have bubblers in tanks. It has always seemed to me that fish have a better chance of survival in a clouded water tank with lots of bubblers. If you over feed on a regular basis it is also a good practice to keep up with water changes and vaccuming the substrate.
As to the question of fish not growing well with less food. My take is that enough food with better water quality is more likely to result in decent fish growth than excess food and poorer water quality. Since going to lighter stocking densities and a lighter feeding schedule the last few decades I have found my fish to live longer and appear to be in better condition.
To those that recall my comments on stocking density some time back this may raise an eyebrow. I do think that high stocking densities can be gotten away with as I did it for a long time, but the work to maintain these high levels of stocking is more trouble than it it worth to me any more. I also have many fewer near crises to deal with and my fish keeping is much more relaxed.