Thanks for your advise I have been reading all about the cycles and was going to wait the 7/10 days before i start testing the water, I also know that you cant put 2 male siamese fighters in the same tank and was thinking about maybe 3 females and 1 male in a couple of months time as I was going to try "hardy" fish first which my local shop has advised. The tank is the Fluval Roma 200 and yes it is 200 litres, not bad for a starter tank. You get a very good package with it (200w heater, Fluval 205 external filter with lots of other bits but it did cosh 300 quid but i was looking around for 2 weeks solid for the best package for the space i had. The media in the filter are some white little tubes (2 cages) and carbon in abreathable bag (2 cages) and some sponge filtering. I went for the Fluval over the Juwel as I wanted a external filter, I will carrying on reading information and thank you for posting
I will let you know the results after sunday.
Oh good, sounds nice and great you went for the external cannister filter. The "white tubes" are what we refer to as "ceramic rings" and they are one of the best types of biomedia because the porous ceramic surface is great for anchoring the beneficial bacteria, the solid hardness of the ceramic also means they last forever and the ring shape and weight allow them to "randomize" the water paths whey they are allowed to fall randomly in their filter tray. The carbon (aka charcoal, aka activated charcoal) is not needed and you can pull that out and put more biomedia in. Carbon is a form of "chemical" filtration and is only needed on special occasions, like to remove medications or tannins or organic odors. Carbon only lasts 3 days and then is removed and disposed of, so you don't want it on a regular basis normally. The kits just put it in hoping that you'll spend a lot replacing it and making them money.
The 7/10 day wait that you mention above has no meaning. Its ok to run your filter a day or so before starting your fishless cycling, just to confirm the filter is working, but really there's not even that need. The important thing is to practice with your master test kit on the tap and tank water and to find the pure ammonia that you will be cycling with. You will have plenty of time to discuss stocking plans with the members during the month or more that the filter is becoming operational.
As you will read in the articles, ammonia and nitrite are going to be the key things to focus on. What we've learned in recent years is that ammonia, which is expelled from fish gills during respiration and is created from fish waste, excess food and plant debris, is even more hazardous to fish than previously thought. It causes permanent gill damage and eventual death even in relatively small amounts, even though the effects of the damage are delayed in showing. Our first bacterial species, once its grown and established in the filter will eat ammonia and produce nitrite(NO2) which unfortunately is also very bad for fish. Nitrite(NO2) attaches to fish hemoglobin, taking up spaces reserved for oxygen and causes suffocation with resulting permanent nerve damage. Our second bacterial species in the mature filter will eat nitrite(NO2) and use it to produce nitrate(NO3) which is much less harmful to fish and can be removed during your weekly water change.
The nurturing and growth of these two beneficial species of bacteria is the most important focus of the aquarist during the first month or so of filter preparation. Luckily, we've learned to keep our fish out of this mess while we're doing it and we've learned to use pure household ammonia to make the process go as predictably as possible. During this time, good liquid-reagent based test kits are the best friend of the beginner - they should be the most important item brought home in the beginner's setup. During the fishless cycling process you test for ammonia, nitrite(NO2) and pH usually each morning and evening and keep a log of the results. This gives you "trend" information that helps you know how your cycle is proceeding.
OK, good luck reading and thinking up your next questions,
~~waterdrop~~