* Keeping freshwater fish outside during spring and summer is a remarkable way of keeping fish. In a way, there's much more motivation to create a natural habitat in comparison to an aquarium inside the house. For in a regular aquarium people have the urge to create a clear water biotope where one is still able to watch the fish more clearly and in general this means a less natural habitat. But once a tank is used outside and it has to blend in in the backyard... one is more urged to use vegetation which are meant for ponds and the use of other natural ornaments. And an environment like that is a much more better housing for the fish as we speak...
* Water temperature can be of importance to determine the sexes offspring. This goes specifically for livebearing tooth carps in general. When a female is kept at lower temperatures during pregnancy, a bigger male or female offspring will develop. But in case the temperature will be increased during pregnancy, it will be the other way around. I'm not specifically mentioning that lower temperatures will result in more males or females. For it depends on the kind of livebearer species which way works best. This is not a 100% guarantee that it will work for Mother Nature has got her own mind on this. But it does work most of the time.
* Breeding problems? In free nature a lot of fish are stimulated to reproduce themselves after a rain shower occurs. You can simulate this situation by refreshing some parts of the water in your tank on a frequent bases and there will be a higher ratio of spawning and mating fish.
But also using dried leaves (you do have to be careful what kind of leaves you're using) will do the job. You can find them outdoors and dry them yourselves or buy them (see photo right).
But be aware that the water may get tanned. Which isn't a negative thing, btw.
* Trying to keep your fish free from fungus and making the water softer can easily be done by usiing alder plugs. Rinse them before using. Otherwise, you water will be tanned. If you don´t mid a tanned biotope, just let them float first on the water surface. Once they´ve absorbed the water, they´ll sink to the bottom.
* To keep your tank or pond free from algae or reduced from algae, you can use willow twigs.
But also using freshwater clams (mussels) can help you out with your algae growth problem.
Another way to make a fish tank, tub or pond algae free or even clear, is to use maërl. Maërl is usely sold for ponds. But it works perfectly in fishtanks as well. I prefer the granulate version instead of the powder version, to avoid cloudiness of the water.
It also hardens the water, if that's desirable.
Maërl is a collective name for non-geniculate coralline red algae with a certain growth habit. In Europe maërl beds occur throughout the Mediterranean, along most odf the Atlantic coast from Portugal to Norway, and in the English Channel, Irish Sea and North Sea. The distribution of maërl is dependent on water movement, light and sdalinity concentration. Maërl beds occur in the photic zone (this is also called the sunlight zone and this is the uppermost layer of a body of water that receives sunlight). And can be found to around 30 meters depth in the British isles and up to 120 meters deep in the Mediterranean. Maërl is dredged from the sea floor and crushed to form a powder. Maërl is rich of minerals, which favors the fish.
Maërl is sold by many brands.
* If you'd to make pictures of you fish but they are to vivid to take a decent shot, try to use a photo container. You can even make one yourself. But also other small containers will do the job perfectly.
* Tank cover needed? Most of my tanks are open tanks. So, without a lid or canopy. Despite of the fact that most fish are potential jumpers, doesn't mean that they will also jump if there's no lid or canopy that is holding them back.
But in case the risk is a bit too high, I do use a glass pane as a tank cover. But it won't close the whole top of the tank. I always leave some open space, so the gasses can be released out of the water.
But there are also other options to make a cover with an option to let the gasses escape. Simply by using a paint grid (comes in multiple sizes) will do the job as well. It's a cheap and practical solution. Also the sizes of the openings of the grid differ depending on the size of the grid itself. So, take in consideration the size of the fish and the openings of the grid. So, they can't get through...
*How to make a gravel filter yourself...
1. Using a simple plastic cutlery tray .
2. Cut it in the right size.
3. Put the cut cutlery tray in place upside down.
4. measure the right length of this pvc pipe (Ø 32 mm/ 40 mm will do).
5. Cut the pvc pipe on the right length.
6. Place the pvc pipe on the right spot (you can glue it or put it loose on the tray.
7. Put an elbow on the pipe (doesn't need to be glued).
8. On top of the tray, gravel or substrate can be used.
9. Put an aeration stone connected to an aeration pump in the pve pipe.
10. Now you've got a functional gravel filter.
*There are many ways to separate pregnant females from the other fish or separate the newborn fry from the adults.
Overhere a simple method to get things started. Cut a piece of plasticized chicken wire. Be sure to cut the sharp endings on each side. So, it won't hurt the fish. Roll it like a tube. And be sure to push the bottom part into the sand, gravel or substrate. You can place it anywhere in the tank. I prefer to put them in the corner of a tank. The openings are big enough to let adult and young guppies (or other not too large livebearers) swim through it. But they can't rush through it in order to chase the fry. Overhere some tuxedo red guppies that won't chase their own fry, btw. But it will give the fry a place to hide to have some rest.
I also put some plants like hornwort in this cilinder of chicken wire. Works perfectly...
Above: One can also use these spheres that are available at flower shops and garden centers. The artificial spheres will float and are hollow from the inside. Fry can seek shelter in there without any chance that adult fish can get to them.
Below: Using an artificial turf tiles or imitation flower tufts that are available at flower shops, garden center and at interior stores can also come in handy. Just roll them as a cylinder and use ty-raps to hold the shape.. Put them in a fishtank in a standing position. This creates also shelter for the fry for the inside is hollow. And adults are too big to swim in.
Above right: It's clear that only the fry or very small fish can swim through this turf tile cylinder.