Harry Potter: The Dragon Lord Arrives at Hogwarts

"That... Please wait a minute!

Dudley spoke up.

......

Allie turned her head suspiciously... I saw Du Li turn around and take out an item from his backpack.

This item has a peculiar shape....

The bottom is a mesh structure.

At the top, there are plastic pipes....

At the edges are small holes for ventilation.

See this strange device.

Ron and Allie both looked at Dudley suspiciously....

Dudley explained casually:

"Senior sister

You didn't tell me before....

I see so many black-scaled fish discarded in the trash every day....

Whereas...... Feeling a little sad?

Before I came to Hogwarts....

Saw it in a magazine!

The living space of the black-scaled fish....

There are certain requirements for "water quality"!

They...... There is a high oxygen content requirement for the water in the pool.

And this filter in my hand ....

You place it at the exit of the tank!

And then....

Place the other end in a larger pool....

So that the water will circulate with each other....

to increase the contact surface between water and air....

Also increase... Dissolved oxygen increases the oxygen content in the water..."

Dudley said this, looking at Senior Sister Allie's face full of doubts....

I couldn't help but sigh....

Really...... Is it still too abrupt to explain "these" to a little wizard who is a year or two older than himself?

......

After thinking about it, Dudley said directly:

"In short....

Senior Sister Allie....

As long as you put this water pipe at the inlet and outlet positions of the water tank....

Even if the black-scaled fish does not cast a spell to clean the fish tank the next day....

They can still survive! "

......

"Really?"

Allie stared at her big round eyes, her pupils full of disbelief...

"Dudley....

I also think this little thing....

It should....

There should be no such 'strong' effect....

This kind of problem should have been in Hufflepuff for a long time....

But....

Still not well resolved....

I think...... There should be 'details' that we don't know...

Or else... Even if it can be solved, it won't be our first-grade little wizard's turn to deal with it!

Ron expressed doubt.

Although....

He's not a foodie!

Peacetime...... There are not many opportunities to eat seafood....

But...... This didn't prevent him from making up what a little first-year wizard should be able to do.

Seriously!

If...... A little first-year wizard is able to solve the Hufflepuff Branch...

A problem that has not been solved for a long time ... It's simply... It's incredible!

Allie on the side nodded with a smile!

Her eyes quietly bent...

And then...... Look at the little wizard beside him.

"Hmm.... I think you're right, and what's your name?

Allie asked.

Ron quickly replied:

"Hello senior sister..."

My name is Ron Weasley, you can just call me Ron! Ron

scratched his red hair a little embarrassed....

For the appearance of the pretty big sister....

He always felt that he had little resistance.

Although......

It's not like each other....

But....

He is born out of the instinct of a little gentleman!

I also want to leave a polite impression on the other person....

Dudley, who was sandwiched between the two, was very helpless....

After all, in theory....

Senior Sister Allie in front of him, and Ron are both eleven or twelve-year-old children.

Myself...... It should not be so easy to explain the structural principle of the filter with them....

Moreover .

. The composition of the filter is obvious.

Most aquarium filtration systems are mainly composed of upper filtration... Trickle Flow... Bottom filtration... Filter barrels... Side filtering... Back filtering....

These filtration systems consist of....

In addition....

Then explain to these two little children to make the water flow to increase the contact surface between the water and the air....

Increase dissolved oxygen and increase oxygen content in water....

This logic involving oxygen is too abrupt.

Thought about it....

Dudley had to hand the small filter device in his hand back to Allie, and then said with a serious face:

"Senior Sister Allie..."

Could it be....

Have you forgotten the agreement you made with me when I went to the back kitchen two days ago? Hearing

Dudley's inquiry, Allie's face lifted, revealing a puzzled look....

Finally clench your fists....

Hit on the other white and tender palm.

"Oh~

" "I remembered....

Be...... There is such a thing....

You said that if you can help me solve this problem, then I promise you to 'eat' aquatic fish every day....

However

Dudley, I also think I was joking with you at the time....

It doesn't matter if you can't solve it....

Wait a while....

These fish will be delivered again by the surrounding food suppliers..."

Allie's hands together on her knees....

Looking down at Dudley 1 in front of him, he showed

a kind smile:

"Okay...

Dudley, I accept your wishes....

In addition....

I'm going to class now....

You know, Professor McGonagall has a very bad temper!

If...... Let her know that I was nagging at the door for too long.

Maybe she's going to punish us for copying the 'Transfiguration Lesson' spell exercises..."

Allie said and stretched out her hand, intending to put Dudley's filter device in the pocket behind her.

However, Dudley thought for a while and spoke:

"Senior Sister Allie, wait first~"

Allie's footsteps paused and looked at Dudley suspiciously....

It is not clear what else is going on with this junior brother.

Her personality has always been mild, and if it weren't for her fear of Professor McGonagall's sternness, she really liked to explain food ideas to this white junior brother in front of her...

.....

PS: Update, I wish you all good results at the end of the semester~ The author continues to work hard to codeword