This Week I Learned 2018 - Week 09

Last week post of something from the past.


Google Chrome's Lighthouse. Yes, definitely a good tool. Now you don't need an external consultant to advise you on how to fully optimize your website or web application. Definitely important if you want to implement RPRL pattern in your Progressive Web Apps (PWAs). Web development is getting more complex due to increasing popularity of mobile web.

If you're doing any forms of technical support, documentation is a slow but good return of investment. But yet, so many organization and developers does not enforce or encourage such practice due to myriad of silly and selfish reasons.

Signal foundation (via HN), made possible (50 millions donation) by co-founder of Whatsapp, Brian Acton. Will this work? Sincerely, hope it will works. We definitely needs free and open source privacy technology to enable secure communication.

Comparison between regular glass, crystal glass, and acrylic glass. In the end of the day, availability and price will determine which type of aquarium glass you will buy. If you need a large quantities of aquarium tank, might as well go to DIY route and build it yourself. We've seen quite a few aquarium shop build their own aquarium tanks.

Collecting in the Swamps of Peninsular Malaysia. There are or were a group of local Betta fish breeder as well as fisheries department who specialized in wild Betta that are unique in MY. Unfortunately, local Betta fishes are lackluster compare to the species breed by our neighboring countries.

P1, F0, F1, what are they? Within a year, you can inbreed your Betta fishes until four generations from F0/P1 till F3/P4. Betta fish, either male or female, on average, is mature enough for breeding when they reach 3 months old. For each generation, we pick the best feature we want and breed selectively to create our line. It's a long tedious process and some even took years to get the right features and colour combination. For faster result, we can try outbreeding.

A few more dead fishes reminded me to re-read this article on how to how to ship fish in a box, which tells us a lot about handling water quality parameters (temperature, pH, and oxygen or carbon dioxide level). This information is crucial when you want to extend the longevity of your aquarium fishes. A few key notes from the articles which I've summarized it here:

1/ Wild Betta fish live in warm tropical padi field with the optimum temperatures between 25.5 till 26.5 Celsius. As fish is cold-blooded animal and can't regulate their body temperature, it will follow the temperature of the surrounding water. That is why you will need to acclimate the fish for 15 till 20 minutes before moving it to a new tank. Sudden changes in temperature will stress out the fish and make it susceptible to diseases.

2/ When packaging, use minimum possible water or one-thirds water. Simply because oxygen is hard to dissolve in water and we need as much oxygen as possible.

3/ There is one local breeder which uses sedatives or tranquilizers and he advised us not to mix the packaging water into the aquarium.

4/ So many fish medications do not even list the active ingredient even a Material Safety Data Sheet (MSDS). It makes you wonder long exposure to these chemical liquids will do to us?

5/ Salts (non-treated or coarse/rock salt) is your best friend. Use 2 to 11 grams per liter or 1 tea-spoon per 5 gallons. While some said using salts (aquarium salts is controversial), it does provides multiple benefits. Good example is to disinfect any equipment shared between multiple tanks. We've seen some aquarium shop uses it for their Betta fish and we've personally use it as well. Well, it seems to work for them and us. Furthermore, it also reduces osmoregulatory stress.

6/ Antibiotics? Some aquarium shop use it (yellow powder). Avoid it at any costs as it's harmful to both fishes and human in long term. Bacteria can build resistance over prolong usage.

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