I think you still have room for 1 more species of fish. The Galaxy Rasbora should be fine bit personally , I think you should go for a bigger species of fish, like some Glowlight Danios?
Excuse me for going a little off track but I reckon that Katch has about 17 imp gall in his tank and if you applied the inch per gallon rule of thumb, wouldn`t he already be over stocked at about 28 inches ?
Am I missing a trick here ? (remember I`m a newbie)
1 tip: Never use that rule. Its inaccurate and should never be relied on
I respectfully disagree with this.
I feel the "Inch Guideline" (and I feel we should -always- try to use the word guideline and not "rule") is in fact the one simple tip that the beginner (who can understandably overwhelmed with multiple tips to learn) CAN rely on.
Its precisely because it is an oversimplified tip that it works for beginners: It lands them at a reasonably safe stocking level if they can not yet get a handle on, or do not yet have access to, all the many and varied exceptions that an intermediate or experienced aquarist calls upon to decide to stock at a -different- level.
I believe I understand where you are coming from, in that all the other parts of the reality are true (that larger bodied fish represent greater bioload and smaller bodied fish represent less bioload than the inch guideline would give you, that different maintenance and equipment situations can and must have an impact, and many other things) but I just must reach the reverse conclusion that safer is better, where oversimplified tips for beginners are concerned!
It takes time and effort for a beginner to formulate the more accurate picture that experienced aquarists use stocking levels that range from below the inch guideline to above the guideline and that they are weighing a lot of things when they do that. Among other things, a beginner, by definition, does not yet know what it feels like to maintain their tank on a weekly basis and to figure out if they can truly fit this in to their lifestyle. An overstocked tank ties one to maintenance more intensely.
By positioning the beginner at a fairly safe stocking level on the stocking continuum, the inch guideline gives them a better chance of experiencing success in their first two years, during which they are learning what it all feels like and hopefully learning more about what's involved in maintaining tanks that are under or overstocked relative to the inch guideline.
~~waterdrop~~